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<div class="title">opennurbs_viewport.h</div>  </div>
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<div class="contents">
<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="comment">/* $NoKeywords: $ */</span></div>
<div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="comment">/*</span></div>
<div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="comment">// Copyright (c) 1993-2012 Robert McNeel &amp; Associates. All rights reserved.</span></div>
<div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="comment">// OpenNURBS, Rhinoceros, and Rhino3D are registered trademarks of Robert</span></div>
<div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="comment">// McNeel &amp; Associates.</span></div>
<div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="comment">// THIS SOFTWARE IS PROVIDED &quot;AS IS&quot; WITHOUT EXPRESS OR IMPLIED WARRANTY.</span></div>
<div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;<span class="comment">// ALL IMPLIED WARRANTIES OF FITNESS FOR ANY PARTICULAR PURPOSE AND OF</span></div>
<div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;<span class="comment">// MERCHANTABILITY ARE HEREBY DISCLAIMED.</span></div>
<div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;<span class="comment">//              </span></div>
<div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;<span class="comment">// For complete openNURBS copyright information see &lt;http://www.opennurbs.org&gt;.</span></div>
<div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;<span class="comment">*/</span></div>
<div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160; </div>
<div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;<span class="comment">//   defines ON_Viewport</span></div>
<div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;<span class="comment"></span> </div>
<div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;<span class="preprocessor">#if !defined(OPENNURBS_VIEWPORT_INC_)</span></div>
<div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;<span class="preprocessor">#define OPENNURBS_VIEWPORT_INC_</span></div>
<div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160; </div>
<div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;<span class="comment">// Class  ON_Viewport</span></div>
<div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;<span class="comment">//  This object represents a viewing frustum</span></div>
<div class="line"><a name="l00031"></a><span class="lineno"><a class="line" href="class_o_n___viewport.html">   31</a></span>&#160;<span class="comment"></span><span class="keyword">class </span>ON_CLASS <a class="code" href="class_o_n___viewport.html">ON_Viewport</a> : <span class="keyword">public</span> <a class="code" href="class_o_n___geometry.html">ON_Geometry</a> </div>
<div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;{</div>
<div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;    ON_OBJECT_DECLARE( <a class="code" href="class_o_n___viewport.html">ON_Viewport</a> );</div>
<div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;<span class="keyword">public</span>:</div>
<div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160; </div>
<div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;  <span class="comment">// Default z=up perspective camera direction</span></div>
<div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;  <span class="keyword">static</span> <span class="keyword">const</span> <a class="code" href="class_o_n__3d_vector.html">ON_3dVector</a> Default3dCameraDirection;</div>
<div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160; </div>
<div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;  <span class="comment">// Construction</span></div>
<div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;    <a class="code" href="class_o_n___viewport.html">ON_Viewport</a>();</div>
<div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;  ~<a class="code" href="class_o_n___viewport.html">ON_Viewport</a>();</div>
<div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;    <a class="code" href="class_o_n___viewport.html">ON_Viewport</a>&amp; operator=( <span class="keyword">const</span> <a class="code" href="class_o_n___viewport.html">ON_Viewport</a>&amp; );</div>
<div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160; </div>
<div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;  <span class="keywordtype">bool</span> IsValidCamera() <span class="keyword">const</span>;</div>
<div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;  <span class="keywordtype">bool</span> IsValidFrustum() <span class="keyword">const</span>;</div>
<div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160; </div>
<div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;  <span class="comment">// ON_Object overrides //////////////////////////////////////////////////////</span></div>
<div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;  <span class="comment">//</span></div>
<div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160; </div>
<div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;<span class="comment">  Description:</span></div>
<div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;<span class="comment">    Test for a valid camera, frustum, and screen port.</span></div>
<div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;<span class="comment">  Parameters:</span></div>
<div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;<span class="comment">    text_log - [in] if the object is not valid and text_log</span></div>
<div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;<span class="comment">        is not NULL, then a brief englis description of the</span></div>
<div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;<span class="comment">        reason the object is not valid is appened to the log.</span></div>
<div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;<span class="comment">        The information appended to text_log is suitable for </span></div>
<div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;<span class="comment">        low-level debugging purposes by programmers and is </span></div>
<div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;<span class="comment">        not intended to be useful as a high level user </span></div>
<div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;<span class="comment">        interface tool.</span></div>
<div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;<span class="comment">  Returns:</span></div>
<div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;<span class="comment">    @untitled table</span></div>
<div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;<span class="comment">    true     camera, frustum, and screen port are valid.</span></div>
<div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;<span class="comment">    false    camera, frustum, or screen port is invalid.</span></div>
<div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;<span class="comment">  Remarks:</span></div>
<div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;<span class="comment">    Overrides virtual ON_Object::IsValid</span></div>
<div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;<span class="comment">  See Also:</span></div>
<div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;<span class="comment">    IsValidCamera, IsValidFrustum</span></div>
<div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;  ON_BOOL32 IsValid( <a class="code" href="class_o_n___text_log.html">ON_TextLog</a>* text_log = NULL ) <span class="keyword">const</span>;</div>
<div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160; </div>
<div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;  <span class="comment">// Description:</span></div>
<div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;  <span class="comment">//   Dumps debugging text description to a text log.</span></div>
<div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;  <span class="comment">//</span></div>
<div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;  <span class="comment">// Parameters:</span></div>
<div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;  <span class="comment">//   dump_target - [in] text log</span></div>
<div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;  <span class="comment">//</span></div>
<div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;  <span class="comment">// Remarks:</span></div>
<div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;  <span class="comment">//   This overrides the virtual ON_Object::Dump() function.</span></div>
<div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;  <span class="keywordtype">void</span> Dump( </div>
<div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;    <a class="code" href="class_o_n___text_log.html">ON_TextLog</a>&amp; <span class="comment">// dump_target</span></div>
<div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;    ) <span class="keyword">const</span>;</div>
<div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160; </div>
<div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;  <span class="comment">// Description:</span></div>
<div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;  <span class="comment">//   Writes ON_Viewport defintion from a binary archive.</span></div>
<div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;  <span class="comment">//</span></div>
<div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;  <span class="comment">// Parameters:</span></div>
<div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;  <span class="comment">//   binary_archive - [in] open binary archive</span></div>
<div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;  <span class="comment">//</span></div>
<div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;  <span class="comment">// Returns:</span></div>
<div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;  <span class="comment">//   true if successful.</span></div>
<div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;  <span class="comment">//</span></div>
<div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160;  <span class="comment">// Remarks:</span></div>
<div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160;  <span class="comment">//   This overrides the virtual ON_Object::Write() function.</span></div>
<div class="line"><a name="l00095"></a><span class="lineno">   95</span>&#160;  ON_BOOL32 Write(</div>
<div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160;         <a class="code" href="class_o_n___binary_archive.html">ON_BinaryArchive</a>&amp;  <span class="comment">// binary_archive</span></div>
<div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;       ) <span class="keyword">const</span>;</div>
<div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160; </div>
<div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160; </div>
<div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;  <span class="comment">// Description:</span></div>
<div class="line"><a name="l00101"></a><span class="lineno">  101</span>&#160;  <span class="comment">//   Reads ON_Viewport defintion from a binary archive.</span></div>
<div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160;  <span class="comment">//</span></div>
<div class="line"><a name="l00103"></a><span class="lineno">  103</span>&#160;  <span class="comment">// Parameters:</span></div>
<div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160;  <span class="comment">//   binary_archive - [in] open binary archive</span></div>
<div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160;  <span class="comment">//</span></div>
<div class="line"><a name="l00106"></a><span class="lineno">  106</span>&#160;  <span class="comment">// Returns:</span></div>
<div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160;  <span class="comment">//   true if successful.</span></div>
<div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160;  <span class="comment">//</span></div>
<div class="line"><a name="l00109"></a><span class="lineno">  109</span>&#160;  <span class="comment">// Remarks:</span></div>
<div class="line"><a name="l00110"></a><span class="lineno">  110</span>&#160;  <span class="comment">//   This overrides the virtual ON_Object::Read() function.</span></div>
<div class="line"><a name="l00111"></a><span class="lineno">  111</span>&#160;  ON_BOOL32 Read(</div>
<div class="line"><a name="l00112"></a><span class="lineno">  112</span>&#160;         <a class="code" href="class_o_n___binary_archive.html">ON_BinaryArchive</a>&amp;  <span class="comment">// binary_archive</span></div>
<div class="line"><a name="l00113"></a><span class="lineno">  113</span>&#160;       );</div>
<div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160; </div>
<div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160; </div>
<div class="line"><a name="l00116"></a><span class="lineno">  116</span>&#160;  <span class="comment">// ON_Geometry overrides //////////////////////////////////////////////////////</span></div>
<div class="line"><a name="l00117"></a><span class="lineno">  117</span>&#160;  <span class="comment">//</span></div>
<div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160; </div>
<div class="line"><a name="l00119"></a><span class="lineno">  119</span>&#160;  <span class="comment">// Description:</span></div>
<div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160;  <span class="comment">//   The dimension of a camera view frustum is 3.</span></div>
<div class="line"><a name="l00121"></a><span class="lineno">  121</span>&#160;  <span class="comment">//</span></div>
<div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;  <span class="comment">// Returns:</span></div>
<div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;  <span class="comment">//   3</span></div>
<div class="line"><a name="l00124"></a><span class="lineno">  124</span>&#160;  <span class="comment">//</span></div>
<div class="line"><a name="l00125"></a><span class="lineno">  125</span>&#160;  <span class="comment">// Remarks:</span></div>
<div class="line"><a name="l00126"></a><span class="lineno">  126</span>&#160;  <span class="comment">//   This is virtual ON_Geometry function.</span></div>
<div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;  <span class="keywordtype">int</span> Dimension() <span class="keyword">const</span>;</div>
<div class="line"><a name="l00128"></a><span class="lineno">  128</span>&#160; </div>
<div class="line"><a name="l00129"></a><span class="lineno">  129</span>&#160;  <span class="comment">// Description:</span></div>
<div class="line"><a name="l00130"></a><span class="lineno">  130</span>&#160;  <span class="comment">//   Gets bounding box of viewing frustum.</span></div>
<div class="line"><a name="l00131"></a><span class="lineno">  131</span>&#160;  <span class="comment">//</span></div>
<div class="line"><a name="l00132"></a><span class="lineno">  132</span>&#160;  <span class="comment">// Parameters:</span></div>
<div class="line"><a name="l00133"></a><span class="lineno">  133</span>&#160;  <span class="comment">//   boxmin - [in/out] array of Dimension() doubles</span></div>
<div class="line"><a name="l00134"></a><span class="lineno">  134</span>&#160;  <span class="comment">//   boxmax - [in/out] array of Dimension() doubles</span></div>
<div class="line"><a name="l00135"></a><span class="lineno">  135</span>&#160;  <span class="comment">//   bGrowBox - [in] (default=false) </span></div>
<div class="line"><a name="l00136"></a><span class="lineno">  136</span>&#160;  <span class="comment">//     If true, then the union of the input bbox and the </span></div>
<div class="line"><a name="l00137"></a><span class="lineno">  137</span>&#160;  <span class="comment">//     object&#39;s bounding box is returned in bbox.  </span></div>
<div class="line"><a name="l00138"></a><span class="lineno">  138</span>&#160;  <span class="comment">//     If false, the object&#39;s bounding box is returned in bbox.</span></div>
<div class="line"><a name="l00139"></a><span class="lineno">  139</span>&#160;  <span class="comment">//</span></div>
<div class="line"><a name="l00140"></a><span class="lineno">  140</span>&#160;  <span class="comment">// Returns:</span></div>
<div class="line"><a name="l00141"></a><span class="lineno">  141</span>&#160;  <span class="comment">//   @untitled table</span></div>
<div class="line"><a name="l00142"></a><span class="lineno">  142</span>&#160;  <span class="comment">//   true     Valid frustum and bounding box returned.</span></div>
<div class="line"><a name="l00143"></a><span class="lineno">  143</span>&#160;  <span class="comment">//   false    Invalid camera or frustum. No bounding box returned.</span></div>
<div class="line"><a name="l00144"></a><span class="lineno">  144</span>&#160;  <span class="comment">//</span></div>
<div class="line"><a name="l00145"></a><span class="lineno">  145</span>&#160;  <span class="comment">// Remarks:</span></div>
<div class="line"><a name="l00146"></a><span class="lineno">  146</span>&#160;  <span class="comment">//   This overrides the virtual ON_Geometry::GetBBox() function.</span></div>
<div class="line"><a name="l00147"></a><span class="lineno">  147</span>&#160;  ON_BOOL32 GetBBox( <span class="comment">// returns true if successful</span></div>
<div class="line"><a name="l00148"></a><span class="lineno">  148</span>&#160;         <span class="keywordtype">double</span>*, <span class="comment">// boxmin</span></div>
<div class="line"><a name="l00149"></a><span class="lineno">  149</span>&#160;         <span class="keywordtype">double</span>*, <span class="comment">// boxmax</span></div>
<div class="line"><a name="l00150"></a><span class="lineno">  150</span>&#160;         ON_BOOL32 = <span class="keyword">false</span> <span class="comment">// bGrowBox</span></div>
<div class="line"><a name="l00151"></a><span class="lineno">  151</span>&#160;         ) <span class="keyword">const</span>;</div>
<div class="line"><a name="l00152"></a><span class="lineno">  152</span>&#160; </div>
<div class="line"><a name="l00153"></a><span class="lineno">  153</span>&#160;  <span class="comment">// Description:</span></div>
<div class="line"><a name="l00154"></a><span class="lineno">  154</span>&#160;  <span class="comment">//   Transforms the view camera location, direction, and up.</span></div>
<div class="line"><a name="l00155"></a><span class="lineno">  155</span>&#160;  <span class="comment">//</span></div>
<div class="line"><a name="l00156"></a><span class="lineno">  156</span>&#160;  <span class="comment">// Parameters:</span></div>
<div class="line"><a name="l00157"></a><span class="lineno">  157</span>&#160;  <span class="comment">//   xform - [in] transformation to apply to camera.</span></div>
<div class="line"><a name="l00158"></a><span class="lineno">  158</span>&#160;  <span class="comment">//</span></div>
<div class="line"><a name="l00159"></a><span class="lineno">  159</span>&#160;  <span class="comment">// Returns:</span></div>
<div class="line"><a name="l00160"></a><span class="lineno">  160</span>&#160;  <span class="comment">//   @untitled table</span></div>
<div class="line"><a name="l00161"></a><span class="lineno">  161</span>&#160;  <span class="comment">//   true     Valid camera was transformed.</span></div>
<div class="line"><a name="l00162"></a><span class="lineno">  162</span>&#160;  <span class="comment">//   false    Invalid camera, frustum, or transformation.</span></div>
<div class="line"><a name="l00163"></a><span class="lineno">  163</span>&#160;  <span class="comment">//</span></div>
<div class="line"><a name="l00164"></a><span class="lineno">  164</span>&#160;  <span class="comment">// Remarks:</span></div>
<div class="line"><a name="l00165"></a><span class="lineno">  165</span>&#160;  <span class="comment">//   This overrides the virtual ON_Geometry::Transform() function.</span></div>
<div class="line"><a name="l00166"></a><span class="lineno">  166</span>&#160;  ON_BOOL32 Transform( </div>
<div class="line"><a name="l00167"></a><span class="lineno">  167</span>&#160;         <span class="keyword">const</span> <a class="code" href="class_o_n___xform.html">ON_Xform</a>&amp; <span class="comment">// xform</span></div>
<div class="line"><a name="l00168"></a><span class="lineno">  168</span>&#160;         );</div>
<div class="line"><a name="l00169"></a><span class="lineno">  169</span>&#160; </div>
<div class="line"><a name="l00170"></a><span class="lineno">  170</span>&#160;  <span class="comment">// Interface /////////////////////////////////////////////////////////////////</span></div>
<div class="line"><a name="l00171"></a><span class="lineno">  171</span>&#160;  <span class="comment">//</span></div>
<div class="line"><a name="l00172"></a><span class="lineno">  172</span>&#160;  <span class="keywordtype">void</span> Initialize();</div>
<div class="line"><a name="l00173"></a><span class="lineno">  173</span>&#160; </div>
<div class="line"><a name="l00174"></a><span class="lineno">  174</span>&#160;  ON::view_projection Projection() <span class="keyword">const</span>;</div>
<div class="line"><a name="l00175"></a><span class="lineno">  175</span>&#160; </div>
<div class="line"><a name="l00176"></a><span class="lineno">  176</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l00177"></a><span class="lineno">  177</span>&#160;<span class="comment">  Description:</span></div>
<div class="line"><a name="l00178"></a><span class="lineno">  178</span>&#160;<span class="comment">    Unconditionally set the projection.</span></div>
<div class="line"><a name="l00179"></a><span class="lineno">  179</span>&#160;<span class="comment">  Parameters:</span></div>
<div class="line"><a name="l00180"></a><span class="lineno">  180</span>&#160;<span class="comment">    projection - [in]</span></div>
<div class="line"><a name="l00181"></a><span class="lineno">  181</span>&#160;<span class="comment">  See Also:</span></div>
<div class="line"><a name="l00182"></a><span class="lineno">  182</span>&#160;<span class="comment">    ON_Viewport::SetParallelProjection</span></div>
<div class="line"><a name="l00183"></a><span class="lineno">  183</span>&#160;<span class="comment">    ON_Viewport::SetPerpectiveProjection</span></div>
<div class="line"><a name="l00184"></a><span class="lineno">  184</span>&#160;<span class="comment">    ON_Viewport::SetTwoPointPerspectiveProjection    </span></div>
<div class="line"><a name="l00185"></a><span class="lineno">  185</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l00186"></a><span class="lineno">  186</span>&#160;  <span class="keywordtype">bool</span> SetProjection( ON::view_projection projection );</div>
<div class="line"><a name="l00187"></a><span class="lineno">  187</span>&#160; </div>
<div class="line"><a name="l00188"></a><span class="lineno">  188</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l00189"></a><span class="lineno">  189</span>&#160;<span class="comment">  Description:</span></div>
<div class="line"><a name="l00190"></a><span class="lineno">  190</span>&#160;<span class="comment">    Use this function to change projections of valid viewports</span></div>
<div class="line"><a name="l00191"></a><span class="lineno">  191</span>&#160;<span class="comment">    from persective to parallel.  It will make common additional</span></div>
<div class="line"><a name="l00192"></a><span class="lineno">  192</span>&#160;<span class="comment">    adjustments to the frustum so the resulting views are similar.</span></div>
<div class="line"><a name="l00193"></a><span class="lineno">  193</span>&#160;<span class="comment">    The camera location and direction will not be changed.</span></div>
<div class="line"><a name="l00194"></a><span class="lineno">  194</span>&#160;<span class="comment">  Parameters:</span></div>
<div class="line"><a name="l00195"></a><span class="lineno">  195</span>&#160;<span class="comment">    bSymmetricFrustum - [in]</span></div>
<div class="line"><a name="l00196"></a><span class="lineno">  196</span>&#160;<span class="comment">      True if you want the resulting frustum to be symmetric.</span></div>
<div class="line"><a name="l00197"></a><span class="lineno">  197</span>&#160;<span class="comment">  Remarks:</span></div>
<div class="line"><a name="l00198"></a><span class="lineno">  198</span>&#160;<span class="comment">    If the current projection is parallel and bSymmetricFrustum,</span></div>
<div class="line"><a name="l00199"></a><span class="lineno">  199</span>&#160;<span class="comment">    FrustumIsLeftRightSymmetric() and FrustumIsTopBottomSymmetric()</span></div>
<div class="line"><a name="l00200"></a><span class="lineno">  200</span>&#160;<span class="comment">    are all equal, then no changes are made and true is returned.</span></div>
<div class="line"><a name="l00201"></a><span class="lineno">  201</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l00202"></a><span class="lineno">  202</span>&#160;  <span class="keywordtype">bool</span> ChangeToParallelProjection( <span class="keywordtype">bool</span> bSymmetricFrustum );</div>
<div class="line"><a name="l00203"></a><span class="lineno">  203</span>&#160; </div>
<div class="line"><a name="l00204"></a><span class="lineno">  204</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l00205"></a><span class="lineno">  205</span>&#160;<span class="comment">  Description:</span></div>
<div class="line"><a name="l00206"></a><span class="lineno">  206</span>&#160;<span class="comment">    Use this function to change projections of valid viewports</span></div>
<div class="line"><a name="l00207"></a><span class="lineno">  207</span>&#160;<span class="comment">    from parallel to perspective.  It will make common additional</span></div>
<div class="line"><a name="l00208"></a><span class="lineno">  208</span>&#160;<span class="comment">    adjustments to the frustum and camera location so the resulting</span></div>
<div class="line"><a name="l00209"></a><span class="lineno">  209</span>&#160;<span class="comment">    views are similar.  The camera direction and target point are</span></div>
<div class="line"><a name="l00210"></a><span class="lineno">  210</span>&#160;<span class="comment">    not be changed.</span></div>
<div class="line"><a name="l00211"></a><span class="lineno">  211</span>&#160;<span class="comment">  Parameters:</span></div>
<div class="line"><a name="l00212"></a><span class="lineno">  212</span>&#160;<span class="comment">    target_distance - [in]</span></div>
<div class="line"><a name="l00213"></a><span class="lineno">  213</span>&#160;<span class="comment">      If ON_UNSET_VALUE this parameter is ignored.  Otherwise</span></div>
<div class="line"><a name="l00214"></a><span class="lineno">  214</span>&#160;<span class="comment">      it must be &gt; 0 and indicates which plane in the current </span></div>
<div class="line"><a name="l00215"></a><span class="lineno">  215</span>&#160;<span class="comment">      view frustum should be perserved.</span></div>
<div class="line"><a name="l00216"></a><span class="lineno">  216</span>&#160;<span class="comment">    bSymmetricFrustum - [in]</span></div>
<div class="line"><a name="l00217"></a><span class="lineno">  217</span>&#160;<span class="comment">      True if you want the resulting frustum to be symmetric.</span></div>
<div class="line"><a name="l00218"></a><span class="lineno">  218</span>&#160;<span class="comment">    lens_length - [in] (pass 50.0 when in doubt)</span></div>
<div class="line"><a name="l00219"></a><span class="lineno">  219</span>&#160;<span class="comment">      35 mm lens length to use when changing from parallel</span></div>
<div class="line"><a name="l00220"></a><span class="lineno">  220</span>&#160;<span class="comment">      to perspective projections. If the current projection</span></div>
<div class="line"><a name="l00221"></a><span class="lineno">  221</span>&#160;<span class="comment">      is perspective or lens_length is &lt;= 0.0,</span></div>
<div class="line"><a name="l00222"></a><span class="lineno">  222</span>&#160;<span class="comment">      then this parameter is ignored.</span></div>
<div class="line"><a name="l00223"></a><span class="lineno">  223</span>&#160;<span class="comment">  Remarks:</span></div>
<div class="line"><a name="l00224"></a><span class="lineno">  224</span>&#160;<span class="comment">    If the current projection is perspective and bSymmetricFrustum,</span></div>
<div class="line"><a name="l00225"></a><span class="lineno">  225</span>&#160;<span class="comment">    FrustumIsLeftRightSymmetric() and FrustumIsTopBottomSymmetric()</span></div>
<div class="line"><a name="l00226"></a><span class="lineno">  226</span>&#160;<span class="comment">    are all equal, then no changes are made and true is returned.</span></div>
<div class="line"><a name="l00227"></a><span class="lineno">  227</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l00228"></a><span class="lineno">  228</span>&#160;  <span class="keywordtype">bool</span> ChangeToPerspectiveProjection( </div>
<div class="line"><a name="l00229"></a><span class="lineno">  229</span>&#160;          <span class="keywordtype">double</span> target_distance,</div>
<div class="line"><a name="l00230"></a><span class="lineno">  230</span>&#160;          <span class="keywordtype">bool</span> bSymmetricFrustum,</div>
<div class="line"><a name="l00231"></a><span class="lineno">  231</span>&#160;          <span class="keywordtype">double</span> lens_length</div>
<div class="line"><a name="l00232"></a><span class="lineno">  232</span>&#160;          );</div>
<div class="line"><a name="l00233"></a><span class="lineno">  233</span>&#160; </div>
<div class="line"><a name="l00234"></a><span class="lineno">  234</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l00235"></a><span class="lineno">  235</span>&#160;<span class="comment">  Description:</span></div>
<div class="line"><a name="l00236"></a><span class="lineno">  236</span>&#160;<span class="comment">    Use this function to change projections of valid viewports</span></div>
<div class="line"><a name="l00237"></a><span class="lineno">  237</span>&#160;<span class="comment">    to a two point perspective.  It will make common additional</span></div>
<div class="line"><a name="l00238"></a><span class="lineno">  238</span>&#160;<span class="comment">    adjustments to the frustum and camera location and direction</span></div>
<div class="line"><a name="l00239"></a><span class="lineno">  239</span>&#160;<span class="comment">    so the resulting views are similar.</span></div>
<div class="line"><a name="l00240"></a><span class="lineno">  240</span>&#160;<span class="comment">  Parameters:</span></div>
<div class="line"><a name="l00241"></a><span class="lineno">  241</span>&#160;<span class="comment">    target_distance - [in]</span></div>
<div class="line"><a name="l00242"></a><span class="lineno">  242</span>&#160;<span class="comment">      If ON_UNSET_VALUE this parameter is ignored.  Otherwise</span></div>
<div class="line"><a name="l00243"></a><span class="lineno">  243</span>&#160;<span class="comment">      it must be &gt; 0 and indicates which plane in the current </span></div>
<div class="line"><a name="l00244"></a><span class="lineno">  244</span>&#160;<span class="comment">      view frustum should be perserved.</span></div>
<div class="line"><a name="l00245"></a><span class="lineno">  245</span>&#160;<span class="comment">    up - [in]</span></div>
<div class="line"><a name="l00246"></a><span class="lineno">  246</span>&#160;<span class="comment">      This direction will be the locked up direction.  Pass </span></div>
<div class="line"><a name="l00247"></a><span class="lineno">  247</span>&#160;<span class="comment">      ON_3dVector::ZeroVector if you want to use the world axis</span></div>
<div class="line"><a name="l00248"></a><span class="lineno">  248</span>&#160;<span class="comment">      direction that is closest to the current up direction.</span></div>
<div class="line"><a name="l00249"></a><span class="lineno">  249</span>&#160;<span class="comment">      Pass CameraY() if you want to preserve the current up direction.</span></div>
<div class="line"><a name="l00250"></a><span class="lineno">  250</span>&#160;<span class="comment">    lens_length - [in] (pass 50.0 when in doubt)</span></div>
<div class="line"><a name="l00251"></a><span class="lineno">  251</span>&#160;<span class="comment">      35 mm lens length to use when changing from parallel</span></div>
<div class="line"><a name="l00252"></a><span class="lineno">  252</span>&#160;<span class="comment">      to perspective projections. If the current projection</span></div>
<div class="line"><a name="l00253"></a><span class="lineno">  253</span>&#160;<span class="comment">      is perspective or lens_length is &lt;= 0.0,</span></div>
<div class="line"><a name="l00254"></a><span class="lineno">  254</span>&#160;<span class="comment">      then this parameter is ignored.</span></div>
<div class="line"><a name="l00255"></a><span class="lineno">  255</span>&#160;<span class="comment">  Remarks:</span></div>
<div class="line"><a name="l00256"></a><span class="lineno">  256</span>&#160;<span class="comment">    If the current projection is perspective and </span></div>
<div class="line"><a name="l00257"></a><span class="lineno">  257</span>&#160;<span class="comment">    FrustumIsLeftRightSymmetric() is true and</span></div>
<div class="line"><a name="l00258"></a><span class="lineno">  258</span>&#160;<span class="comment">    FrustumIsTopBottomSymmetric() is false, then no changes are</span></div>
<div class="line"><a name="l00259"></a><span class="lineno">  259</span>&#160;<span class="comment">    made and true is returned.</span></div>
<div class="line"><a name="l00260"></a><span class="lineno">  260</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l00261"></a><span class="lineno">  261</span>&#160;  <span class="keywordtype">bool</span> ChangeToTwoPointPerspectiveProjection( </div>
<div class="line"><a name="l00262"></a><span class="lineno">  262</span>&#160;          <span class="keywordtype">double</span> target_distance,</div>
<div class="line"><a name="l00263"></a><span class="lineno">  263</span>&#160;          <a class="code" href="class_o_n__3d_vector.html">ON_3dVector</a> up,</div>
<div class="line"><a name="l00264"></a><span class="lineno">  264</span>&#160;          <span class="keywordtype">double</span> lens_length</div>
<div class="line"><a name="l00265"></a><span class="lineno">  265</span>&#160;          );</div>
<div class="line"><a name="l00266"></a><span class="lineno">  266</span>&#160; </div>
<div class="line"><a name="l00267"></a><span class="lineno">  267</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l00268"></a><span class="lineno">  268</span>&#160;<span class="comment">  Returns:</span></div>
<div class="line"><a name="l00269"></a><span class="lineno">  269</span>&#160;<span class="comment">    True if the projection is ON::perspective_view.</span></div>
<div class="line"><a name="l00270"></a><span class="lineno">  270</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l00271"></a><span class="lineno">  271</span>&#160;  <span class="keywordtype">bool</span> IsPerspectiveProjection() <span class="keyword">const</span>;</div>
<div class="line"><a name="l00272"></a><span class="lineno">  272</span>&#160; </div>
<div class="line"><a name="l00273"></a><span class="lineno">  273</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l00274"></a><span class="lineno">  274</span>&#160;<span class="comment">  Returns</span></div>
<div class="line"><a name="l00275"></a><span class="lineno">  275</span>&#160;<span class="comment">    IsPerspectiveProjection() </span></div>
<div class="line"><a name="l00276"></a><span class="lineno">  276</span>&#160;<span class="comment">    &amp;&amp; CameraUpIsLocked()</span></div>
<div class="line"><a name="l00277"></a><span class="lineno">  277</span>&#160;<span class="comment">    &amp;&amp; FrustumIsLeftRightSymmetric</span></div>
<div class="line"><a name="l00278"></a><span class="lineno">  278</span>&#160;<span class="comment">    &amp;&amp; !FrustumIsTopBottomSymmetric</span></div>
<div class="line"><a name="l00279"></a><span class="lineno">  279</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l00280"></a><span class="lineno">  280</span>&#160;  <span class="keywordtype">bool</span> IsTwoPointPerspectiveProjection() <span class="keyword">const</span>;</div>
<div class="line"><a name="l00281"></a><span class="lineno">  281</span>&#160; </div>
<div class="line"><a name="l00282"></a><span class="lineno">  282</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l00283"></a><span class="lineno">  283</span>&#160;<span class="comment">  Returns:</span></div>
<div class="line"><a name="l00284"></a><span class="lineno">  284</span>&#160;<span class="comment">    True if the projection is ON::parallel_view.</span></div>
<div class="line"><a name="l00285"></a><span class="lineno">  285</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l00286"></a><span class="lineno">  286</span>&#160;  <span class="keywordtype">bool</span> IsParallelProjection() <span class="keyword">const</span>;</div>
<div class="line"><a name="l00287"></a><span class="lineno">  287</span>&#160; </div>
<div class="line"><a name="l00288"></a><span class="lineno">  288</span>&#160;  <span class="comment">// These return true if the current direction and up are not zero and not</span></div>
<div class="line"><a name="l00289"></a><span class="lineno">  289</span>&#160;  <span class="comment">// parallel so the camera position is well defined.</span></div>
<div class="line"><a name="l00290"></a><span class="lineno">  290</span>&#160;  <span class="keywordtype">bool</span> SetCameraLocation( <span class="keyword">const</span> <a class="code" href="class_o_n__3d_point.html">ON_3dPoint</a>&amp; );</div>
<div class="line"><a name="l00291"></a><span class="lineno">  291</span>&#160;  <span class="keywordtype">bool</span> SetCameraDirection( <span class="keyword">const</span> <a class="code" href="class_o_n__3d_vector.html">ON_3dVector</a>&amp; );</div>
<div class="line"><a name="l00292"></a><span class="lineno">  292</span>&#160;  <span class="keywordtype">bool</span> SetCameraUp( <span class="keyword">const</span> <a class="code" href="class_o_n__3d_vector.html">ON_3dVector</a>&amp; );</div>
<div class="line"><a name="l00293"></a><span class="lineno">  293</span>&#160; </div>
<div class="line"><a name="l00294"></a><span class="lineno">  294</span>&#160;  <a class="code" href="class_o_n__3d_point.html">ON_3dPoint</a> CameraLocation() <span class="keyword">const</span>;</div>
<div class="line"><a name="l00295"></a><span class="lineno">  295</span>&#160;  <a class="code" href="class_o_n__3d_vector.html">ON_3dVector</a> CameraDirection() <span class="keyword">const</span>;</div>
<div class="line"><a name="l00296"></a><span class="lineno">  296</span>&#160;  <a class="code" href="class_o_n__3d_vector.html">ON_3dVector</a> CameraUp() <span class="keyword">const</span>;</div>
<div class="line"><a name="l00297"></a><span class="lineno">  297</span>&#160; </div>
<div class="line"><a name="l00298"></a><span class="lineno">  298</span>&#160;  <span class="keywordtype">bool</span> CameraLocationIsLocked() <span class="keyword">const</span>;</div>
<div class="line"><a name="l00299"></a><span class="lineno">  299</span>&#160;  <span class="keywordtype">bool</span> CameraDirectionIsLocked() <span class="keyword">const</span>;</div>
<div class="line"><a name="l00300"></a><span class="lineno">  300</span>&#160;  <span class="keywordtype">bool</span> CameraUpIsLocked() <span class="keyword">const</span>;</div>
<div class="line"><a name="l00301"></a><span class="lineno">  301</span>&#160;  <span class="keywordtype">bool</span> FrustumIsLeftRightSymmetric() <span class="keyword">const</span>;</div>
<div class="line"><a name="l00302"></a><span class="lineno">  302</span>&#160;  <span class="keywordtype">bool</span> FrustumIsTopBottomSymmetric() <span class="keyword">const</span>;</div>
<div class="line"><a name="l00303"></a><span class="lineno">  303</span>&#160; </div>
<div class="line"><a name="l00304"></a><span class="lineno">  304</span>&#160;  <span class="keywordtype">void</span> SetCameraLocationLock( <span class="keywordtype">bool</span> bLockCameraLocation );</div>
<div class="line"><a name="l00305"></a><span class="lineno">  305</span>&#160;  <span class="keywordtype">void</span> SetCameraDirectionLock( <span class="keywordtype">bool</span> bLockCameraDirection ) ;</div>
<div class="line"><a name="l00306"></a><span class="lineno">  306</span>&#160;  <span class="keywordtype">void</span> SetCameraUpLock( <span class="keywordtype">bool</span> bLockCameraUp );</div>
<div class="line"><a name="l00307"></a><span class="lineno">  307</span>&#160;  <span class="keywordtype">void</span> SetFrustumLeftRightSymmetry( <span class="keywordtype">bool</span> bForceLeftRightSymmetry );</div>
<div class="line"><a name="l00308"></a><span class="lineno">  308</span>&#160;  <span class="keywordtype">void</span> SetFrustumTopBottomSymmetry( <span class="keywordtype">bool</span> bForceTopBottomSymmetry );</div>
<div class="line"><a name="l00309"></a><span class="lineno">  309</span>&#160;  <span class="keywordtype">void</span> UnlockCamera(); <span class="comment">// sets all camera locks to false</span></div>
<div class="line"><a name="l00310"></a><span class="lineno">  310</span>&#160;  <span class="keywordtype">void</span> UnlockFrustumSymmetry(); <span class="comment">// sets all frustum symmetry locks to false</span></div>
<div class="line"><a name="l00311"></a><span class="lineno">  311</span>&#160; </div>
<div class="line"><a name="l00312"></a><span class="lineno">  312</span>&#160;  <span class="comment">// returns true if current camera orientation is valid</span></div>
<div class="line"><a name="l00313"></a><span class="lineno">  313</span>&#160;  <span class="keywordtype">bool</span> GetCameraFrame(</div>
<div class="line"><a name="l00314"></a><span class="lineno">  314</span>&#160;      <span class="keywordtype">double</span>*, <span class="comment">// CameraLocation[3]</span></div>
<div class="line"><a name="l00315"></a><span class="lineno">  315</span>&#160;      <span class="keywordtype">double</span>*, <span class="comment">// CameraX[3]</span></div>
<div class="line"><a name="l00316"></a><span class="lineno">  316</span>&#160;      <span class="keywordtype">double</span>*, <span class="comment">// CameraY[3]</span></div>
<div class="line"><a name="l00317"></a><span class="lineno">  317</span>&#160;      <span class="keywordtype">double</span>*  <span class="comment">// CameraZ[3]</span></div>
<div class="line"><a name="l00318"></a><span class="lineno">  318</span>&#160;      ) <span class="keyword">const</span>;</div>
<div class="line"><a name="l00319"></a><span class="lineno">  319</span>&#160; </div>
<div class="line"><a name="l00320"></a><span class="lineno">  320</span>&#160;  <span class="comment">// these do not check for a valid camera orientation</span></div>
<div class="line"><a name="l00321"></a><span class="lineno">  321</span>&#160;  <a class="code" href="class_o_n__3d_vector.html">ON_3dVector</a> CameraX() <span class="keyword">const</span>; <span class="comment">// unit to right vector</span></div>
<div class="line"><a name="l00322"></a><span class="lineno">  322</span>&#160;  <a class="code" href="class_o_n__3d_vector.html">ON_3dVector</a> CameraY() <span class="keyword">const</span>; <span class="comment">// unit up vector</span></div>
<div class="line"><a name="l00323"></a><span class="lineno">  323</span>&#160;  <a class="code" href="class_o_n__3d_vector.html">ON_3dVector</a> CameraZ() <span class="keyword">const</span>; <span class="comment">// unit vector in -CameraDirection</span></div>
<div class="line"><a name="l00324"></a><span class="lineno">  324</span>&#160; </div>
<div class="line"><a name="l00325"></a><span class="lineno">  325</span>&#160;  </div>
<div class="line"><a name="l00326"></a><span class="lineno">  326</span>&#160;  <span class="keywordtype">bool</span> IsCameraFrameWorldPlan( </div>
<div class="line"><a name="l00327"></a><span class="lineno">  327</span>&#160;      <span class="comment">// Returns true if the camera direction = some world axis.</span></div>
<div class="line"><a name="l00328"></a><span class="lineno">  328</span>&#160;      <span class="comment">// The indices report which axes are used.  For a &quot;twisted&quot;</span></div>
<div class="line"><a name="l00329"></a><span class="lineno">  329</span>&#160;      <span class="comment">// plan view it is possible to have zero x and y indices.</span></div>
<div class="line"><a name="l00330"></a><span class="lineno">  330</span>&#160;      <span class="comment">// This function returns true if and only if the &quot;z&quot; index</span></div>
<div class="line"><a name="l00331"></a><span class="lineno">  331</span>&#160;      <span class="comment">// is non-zero.</span></div>
<div class="line"><a name="l00332"></a><span class="lineno">  332</span>&#160;      <span class="comment">//</span></div>
<div class="line"><a name="l00333"></a><span class="lineno">  333</span>&#160;      <span class="comment">// Indices are +/-1 = world +/-x, +/-2 = world +/-y, +/-3 = world +/-z,</span></div>
<div class="line"><a name="l00334"></a><span class="lineno">  334</span>&#160;      <span class="keywordtype">int</span>*, <span class="comment">// if true and plan is axis aligned, view x index, else 0</span></div>
<div class="line"><a name="l00335"></a><span class="lineno">  335</span>&#160;      <span class="keywordtype">int</span>*, <span class="comment">// if true and plan is axis aligned, view y index, else 0</span></div>
<div class="line"><a name="l00336"></a><span class="lineno">  336</span>&#160;      <span class="keywordtype">int</span>*  <span class="comment">// if true, view z index, else 0</span></div>
<div class="line"><a name="l00337"></a><span class="lineno">  337</span>&#160;      );</div>
<div class="line"><a name="l00338"></a><span class="lineno">  338</span>&#160; </div>
<div class="line"><a name="l00339"></a><span class="lineno">  339</span>&#160;  <span class="keywordtype">bool</span> GetCameraExtents( </div>
<div class="line"><a name="l00340"></a><span class="lineno">  340</span>&#160;      <span class="comment">// returns bounding box in camera coordinates - this is useful information</span></div>
<div class="line"><a name="l00341"></a><span class="lineno">  341</span>&#160;      <span class="comment">// for setting view frustrums to include the point list</span></div>
<div class="line"><a name="l00342"></a><span class="lineno">  342</span>&#160;      <span class="keywordtype">int</span>,           <span class="comment">// count = number of 3d points</span></div>
<div class="line"><a name="l00343"></a><span class="lineno">  343</span>&#160;      <span class="keywordtype">int</span>,           <span class="comment">// stride = number of doubles to skip between points (&gt;=3)</span></div>
<div class="line"><a name="l00344"></a><span class="lineno">  344</span>&#160;      <span class="keyword">const</span> <span class="keywordtype">double</span>*, <span class="comment">// 3d points in world coordinates</span></div>
<div class="line"><a name="l00345"></a><span class="lineno">  345</span>&#160;      <a class="code" href="class_o_n___bounding_box.html">ON_BoundingBox</a>&amp; cambbox, <span class="comment">// bounding box in camera coordinates</span></div>
<div class="line"><a name="l00346"></a><span class="lineno">  346</span>&#160;      <span class="keywordtype">int</span> bGrowBox = <span class="keyword">false</span>   <span class="comment">// set to true if you want to enlarge an existing camera coordinate box</span></div>
<div class="line"><a name="l00347"></a><span class="lineno">  347</span>&#160;      ) <span class="keyword">const</span>;</div>
<div class="line"><a name="l00348"></a><span class="lineno">  348</span>&#160; </div>
<div class="line"><a name="l00349"></a><span class="lineno">  349</span>&#160;  <span class="keywordtype">bool</span> GetCameraExtents( </div>
<div class="line"><a name="l00350"></a><span class="lineno">  350</span>&#160;      <span class="comment">// returns bounding box in camera coordinates - this is useful information</span></div>
<div class="line"><a name="l00351"></a><span class="lineno">  351</span>&#160;      <span class="comment">// for setting view frustrums to include the point list</span></div>
<div class="line"><a name="l00352"></a><span class="lineno">  352</span>&#160;      <span class="keyword">const</span> <a class="code" href="class_o_n___bounding_box.html">ON_BoundingBox</a>&amp;, <span class="comment">// world coordinate bounding box</span></div>
<div class="line"><a name="l00353"></a><span class="lineno">  353</span>&#160;      <a class="code" href="class_o_n___bounding_box.html">ON_BoundingBox</a>&amp; cambbox, <span class="comment">// bounding box in camera coordinates</span></div>
<div class="line"><a name="l00354"></a><span class="lineno">  354</span>&#160;      <span class="keywordtype">int</span> bGrowBox = <span class="keyword">false</span>   <span class="comment">// set to true if you want to enlarge an existing camera coordinate box</span></div>
<div class="line"><a name="l00355"></a><span class="lineno">  355</span>&#160;      ) <span class="keyword">const</span>;</div>
<div class="line"><a name="l00356"></a><span class="lineno">  356</span>&#160; </div>
<div class="line"><a name="l00357"></a><span class="lineno">  357</span>&#160;  <span class="keywordtype">bool</span> GetCameraExtents( </div>
<div class="line"><a name="l00358"></a><span class="lineno">  358</span>&#160;      <span class="comment">// returns bounding box in camera coordinates - this is useful information</span></div>
<div class="line"><a name="l00359"></a><span class="lineno">  359</span>&#160;      <span class="comment">// for setting view frustrums to include the point list</span></div>
<div class="line"><a name="l00360"></a><span class="lineno">  360</span>&#160;      <a class="code" href="class_o_n__3d_point.html">ON_3dPoint</a>&amp;,     <span class="comment">// world coordinate bounding sphere center</span></div>
<div class="line"><a name="l00361"></a><span class="lineno">  361</span>&#160;      <span class="keywordtype">double</span>,          <span class="comment">// world coordinate bounding sphere radius</span></div>
<div class="line"><a name="l00362"></a><span class="lineno">  362</span>&#160;      <a class="code" href="class_o_n___bounding_box.html">ON_BoundingBox</a>&amp; cambox, <span class="comment">// bounding box in camera coordinates</span></div>
<div class="line"><a name="l00363"></a><span class="lineno">  363</span>&#160;      <span class="keywordtype">int</span> bGrowBox = <span class="keyword">false</span>     <span class="comment">// set to true if you want to enlarge an existing camera coordinate box</span></div>
<div class="line"><a name="l00364"></a><span class="lineno">  364</span>&#160;      ) <span class="keyword">const</span>;</div>
<div class="line"><a name="l00365"></a><span class="lineno">  365</span>&#160; </div>
<div class="line"><a name="l00366"></a><span class="lineno">  366</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l00367"></a><span class="lineno">  367</span>&#160;<span class="comment">  Description:</span></div>
<div class="line"><a name="l00368"></a><span class="lineno">  368</span>&#160;<span class="comment">    Set the view frustum.  If FrustumSymmetryIsLocked() is true</span></div>
<div class="line"><a name="l00369"></a><span class="lineno">  369</span>&#160;<span class="comment">    and left != -right or bottom != -top, then they will be</span></div>
<div class="line"><a name="l00370"></a><span class="lineno">  370</span>&#160;<span class="comment">    adjusted so the resulting frustum is symmetric.</span></div>
<div class="line"><a name="l00371"></a><span class="lineno">  371</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l00372"></a><span class="lineno">  372</span>&#160;  <span class="keywordtype">bool</span> SetFrustum(</div>
<div class="line"><a name="l00373"></a><span class="lineno">  373</span>&#160;        <span class="keywordtype">double</span> left,   <span class="comment">// </span></div>
<div class="line"><a name="l00374"></a><span class="lineno">  374</span>&#160;        <span class="keywordtype">double</span> right,  <span class="comment">//   ( left &lt; right )</span></div>
<div class="line"><a name="l00375"></a><span class="lineno">  375</span>&#160;        <span class="keywordtype">double</span> bottom, <span class="comment">// </span></div>
<div class="line"><a name="l00376"></a><span class="lineno">  376</span>&#160;        <span class="keywordtype">double</span> top,    <span class="comment">//   ( bottom &lt; top )</span></div>
<div class="line"><a name="l00377"></a><span class="lineno">  377</span>&#160;        <span class="keywordtype">double</span> near_dist,   <span class="comment">// </span></div>
<div class="line"><a name="l00378"></a><span class="lineno">  378</span>&#160;        <span class="keywordtype">double</span> far_dist     <span class="comment">//   ( 0 &lt; near_dist &lt; far_dist ) // ignored by Rhino version 1.0</span></div>
<div class="line"><a name="l00379"></a><span class="lineno">  379</span>&#160;        );</div>
<div class="line"><a name="l00380"></a><span class="lineno">  380</span>&#160;  <span class="keywordtype">bool</span> GetFrustum(</div>
<div class="line"><a name="l00381"></a><span class="lineno">  381</span>&#160;        <span class="keywordtype">double</span>* left,        <span class="comment">// </span></div>
<div class="line"><a name="l00382"></a><span class="lineno">  382</span>&#160;        <span class="keywordtype">double</span>* right,       <span class="comment">// (left &lt; right)</span></div>
<div class="line"><a name="l00383"></a><span class="lineno">  383</span>&#160;        <span class="keywordtype">double</span>* bottom,      <span class="comment">// </span></div>
<div class="line"><a name="l00384"></a><span class="lineno">  384</span>&#160;        <span class="keywordtype">double</span>* top,         <span class="comment">// (bottom &lt; top)</span></div>
<div class="line"><a name="l00385"></a><span class="lineno">  385</span>&#160;        <span class="keywordtype">double</span>* near_dist = NULL, <span class="comment">// </span></div>
<div class="line"><a name="l00386"></a><span class="lineno">  386</span>&#160;        <span class="keywordtype">double</span>* far_dist = NULL   <span class="comment">// (0 &lt; near_dist &lt; far_dist)</span></div>
<div class="line"><a name="l00387"></a><span class="lineno">  387</span>&#160;        ) <span class="keyword">const</span>;</div>
<div class="line"><a name="l00388"></a><span class="lineno">  388</span>&#160; </div>
<div class="line"><a name="l00389"></a><span class="lineno">  389</span>&#160;  <span class="comment">// SetFrustumAspect() changes the larger of the frustum&#39;s widht/height</span></div>
<div class="line"><a name="l00390"></a><span class="lineno">  390</span>&#160;  <span class="comment">// so that the resulting value of width/height matches the requested</span></div>
<div class="line"><a name="l00391"></a><span class="lineno">  391</span>&#160;  <span class="comment">// aspect.  The camera angle is not changed.  If you change the shape</span></div>
<div class="line"><a name="l00392"></a><span class="lineno">  392</span>&#160;  <span class="comment">// of the view port with a call SetScreenPort(), then you generally </span></div>
<div class="line"><a name="l00393"></a><span class="lineno">  393</span>&#160;  <span class="comment">// want to call SetFrustumAspect() with the value returned by </span></div>
<div class="line"><a name="l00394"></a><span class="lineno">  394</span>&#160;  <span class="comment">// GetScreenPortAspect().</span></div>
<div class="line"><a name="l00395"></a><span class="lineno">  395</span>&#160;  <span class="keywordtype">bool</span> SetFrustumAspect( <span class="keywordtype">double</span> );</div>
<div class="line"><a name="l00396"></a><span class="lineno">  396</span>&#160; </div>
<div class="line"><a name="l00397"></a><span class="lineno">  397</span>&#160;  <span class="comment">// Returns frustum&#39;s width/height</span></div>
<div class="line"><a name="l00398"></a><span class="lineno">  398</span>&#160;  <span class="keywordtype">bool</span> GetFrustumAspect( <span class="keywordtype">double</span>&amp; ) <span class="keyword">const</span>;</div>
<div class="line"><a name="l00399"></a><span class="lineno">  399</span>&#160; </div>
<div class="line"><a name="l00400"></a><span class="lineno">  400</span>&#160;  <span class="comment">// Returns world coordinates of frustum&#39;s center</span></div>
<div class="line"><a name="l00401"></a><span class="lineno">  401</span>&#160;  <span class="keywordtype">bool</span> GetFrustumCenter( <span class="keywordtype">double</span>* ) <span class="keyword">const</span>;</div>
<div class="line"><a name="l00402"></a><span class="lineno">  402</span>&#160; </div>
<div class="line"><a name="l00403"></a><span class="lineno">  403</span>&#160;  <span class="comment">// The near clipping plane stored in the Rhino 1.0 file is frequently very</span></div>
<div class="line"><a name="l00404"></a><span class="lineno">  404</span>&#160;  <span class="comment">// small and useless for high quality z-buffer based rendering.  The far</span></div>
<div class="line"><a name="l00405"></a><span class="lineno">  405</span>&#160;  <span class="comment">// clipping value is not stored in the file.  Use these functions to set</span></div>
<div class="line"><a name="l00406"></a><span class="lineno">  406</span>&#160;  <span class="comment">// the frustum&#39;s near and far clipping planes to appropriate values.</span></div>
<div class="line"><a name="l00407"></a><span class="lineno">  407</span>&#160;  <span class="keywordtype">double</span> FrustumLeft() <span class="keyword">const</span>;</div>
<div class="line"><a name="l00408"></a><span class="lineno">  408</span>&#160;  <span class="keywordtype">double</span> FrustumRight() <span class="keyword">const</span>;</div>
<div class="line"><a name="l00409"></a><span class="lineno">  409</span>&#160;  <span class="keywordtype">double</span> FrustumBottom() <span class="keyword">const</span>;</div>
<div class="line"><a name="l00410"></a><span class="lineno">  410</span>&#160;  <span class="keywordtype">double</span> FrustumTop() <span class="keyword">const</span>;</div>
<div class="line"><a name="l00411"></a><span class="lineno">  411</span>&#160;  <span class="keywordtype">double</span> FrustumNear() <span class="keyword">const</span>;</div>
<div class="line"><a name="l00412"></a><span class="lineno">  412</span>&#160;  <span class="keywordtype">double</span> FrustumFar() <span class="keyword">const</span>;</div>
<div class="line"><a name="l00413"></a><span class="lineno">  413</span>&#160; </div>
<div class="line"><a name="l00414"></a><span class="lineno">  414</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l00415"></a><span class="lineno">  415</span>&#160;<span class="comment">  Returns:</span></div>
<div class="line"><a name="l00416"></a><span class="lineno">  416</span>&#160;<span class="comment">    frustum right - frustum left</span></div>
<div class="line"><a name="l00417"></a><span class="lineno">  417</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l00418"></a><span class="lineno">  418</span>&#160;  <span class="keywordtype">double</span> FrustumWidth() <span class="keyword">const</span>; <span class="comment">// right - left</span></div>
<div class="line"><a name="l00419"></a><span class="lineno">  419</span>&#160; </div>
<div class="line"><a name="l00420"></a><span class="lineno">  420</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l00421"></a><span class="lineno">  421</span>&#160;<span class="comment">  Returns:</span></div>
<div class="line"><a name="l00422"></a><span class="lineno">  422</span>&#160;<span class="comment">    frustum right - frustum left</span></div>
<div class="line"><a name="l00423"></a><span class="lineno">  423</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l00424"></a><span class="lineno">  424</span>&#160;  <span class="keywordtype">double</span> FrustumHeight() <span class="keyword">const</span>; <span class="comment">// top - bottom</span></div>
<div class="line"><a name="l00425"></a><span class="lineno">  425</span>&#160; </div>
<div class="line"><a name="l00426"></a><span class="lineno">  426</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l00427"></a><span class="lineno">  427</span>&#160;<span class="comment">  Returns:</span></div>
<div class="line"><a name="l00428"></a><span class="lineno">  428</span>&#160;<span class="comment">    Minimum of fabs(FrustumWidth()) and fabs(FrustumHeight())</span></div>
<div class="line"><a name="l00429"></a><span class="lineno">  429</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l00430"></a><span class="lineno">  430</span>&#160;  <span class="keywordtype">double</span> FrustumMinimumDiameter() <span class="keyword">const</span>;</div>
<div class="line"><a name="l00431"></a><span class="lineno">  431</span>&#160; </div>
<div class="line"><a name="l00432"></a><span class="lineno">  432</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l00433"></a><span class="lineno">  433</span>&#160;<span class="comment">  Returns:</span></div>
<div class="line"><a name="l00434"></a><span class="lineno">  434</span>&#160;<span class="comment">    Maximum of fabs(FrustumWidth()) and fabs(FrustumHeight())</span></div>
<div class="line"><a name="l00435"></a><span class="lineno">  435</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l00436"></a><span class="lineno">  436</span>&#160;  <span class="keywordtype">double</span> FrustumMaximumDiameter() <span class="keyword">const</span>;</div>
<div class="line"><a name="l00437"></a><span class="lineno">  437</span>&#160; </div>
<div class="line"><a name="l00438"></a><span class="lineno">  438</span>&#160; </div>
<div class="line"><a name="l00439"></a><span class="lineno">  439</span>&#160;  <span class="keywordtype">bool</span> SetFrustumNearFar(       </div>
<div class="line"><a name="l00440"></a><span class="lineno">  440</span>&#160;         <span class="keyword">const</span> <span class="keywordtype">double</span>* bboxmin,  <span class="comment">// 3d bounding box min</span></div>
<div class="line"><a name="l00441"></a><span class="lineno">  441</span>&#160;         <span class="keyword">const</span> <span class="keywordtype">double</span>* bboxmax   <span class="comment">// 3d bounding box max</span></div>
<div class="line"><a name="l00442"></a><span class="lineno">  442</span>&#160;         );</div>
<div class="line"><a name="l00443"></a><span class="lineno">  443</span>&#160;  <span class="keywordtype">bool</span> SetFrustumNearFar( </div>
<div class="line"><a name="l00444"></a><span class="lineno">  444</span>&#160;         <span class="keyword">const</span> <span class="keywordtype">double</span>* center,  <span class="comment">// 3d bounding sphere center</span></div>
<div class="line"><a name="l00445"></a><span class="lineno">  445</span>&#160;         <span class="keywordtype">double</span> radius         <span class="comment">// 3d bounding sphere radius</span></div>
<div class="line"><a name="l00446"></a><span class="lineno">  446</span>&#160;         );</div>
<div class="line"><a name="l00447"></a><span class="lineno">  447</span>&#160;  <span class="keywordtype">bool</span> SetFrustumNearFar( </div>
<div class="line"><a name="l00448"></a><span class="lineno">  448</span>&#160;         <span class="keywordtype">double</span> near_dist, <span class="comment">// ( &gt; 0 )</span></div>
<div class="line"><a name="l00449"></a><span class="lineno">  449</span>&#160;         <span class="keywordtype">double</span> far_dist   <span class="comment">// </span></div>
<div class="line"><a name="l00450"></a><span class="lineno">  450</span>&#160;         );</div>
<div class="line"><a name="l00451"></a><span class="lineno">  451</span>&#160; </div>
<div class="line"><a name="l00452"></a><span class="lineno">  452</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l00453"></a><span class="lineno">  453</span>&#160;<span class="comment">  Description:</span></div>
<div class="line"><a name="l00454"></a><span class="lineno">  454</span>&#160;<span class="comment">    If needed, adjust the current frustum so it has the </span></div>
<div class="line"><a name="l00455"></a><span class="lineno">  455</span>&#160;<span class="comment">    specified symmetries and adjust the camera location</span></div>
<div class="line"><a name="l00456"></a><span class="lineno">  456</span>&#160;<span class="comment">    so the target plane remains visible.</span></div>
<div class="line"><a name="l00457"></a><span class="lineno">  457</span>&#160;<span class="comment">  Parameters:</span></div>
<div class="line"><a name="l00458"></a><span class="lineno">  458</span>&#160;<span class="comment">    bLeftRightSymmetric - [in]</span></div>
<div class="line"><a name="l00459"></a><span class="lineno">  459</span>&#160;<span class="comment">      If true, the frustum will be adjusted so left = -right.</span></div>
<div class="line"><a name="l00460"></a><span class="lineno">  460</span>&#160;<span class="comment">    bTopBottomSymmetric - [in]</span></div>
<div class="line"><a name="l00461"></a><span class="lineno">  461</span>&#160;<span class="comment">      If true, the frustum will be adjusted so top = -bottom.</span></div>
<div class="line"><a name="l00462"></a><span class="lineno">  462</span>&#160;<span class="comment">    target_distance - [in]</span></div>
<div class="line"><a name="l00463"></a><span class="lineno">  463</span>&#160;<span class="comment">      If projection is not perspective or target_distance </span></div>
<div class="line"><a name="l00464"></a><span class="lineno">  464</span>&#160;<span class="comment">      is ON_UNSET_VALUE, this this parameter is ignored. </span></div>
<div class="line"><a name="l00465"></a><span class="lineno">  465</span>&#160;<span class="comment">      If the projection is perspective and target_distance </span></div>
<div class="line"><a name="l00466"></a><span class="lineno">  466</span>&#160;<span class="comment">      is not ON_UNSET_VALUE, then it must be &gt; 0.0 and</span></div>
<div class="line"><a name="l00467"></a><span class="lineno">  467</span>&#160;<span class="comment">      it is used to determine which plane in the old</span></div>
<div class="line"><a name="l00468"></a><span class="lineno">  468</span>&#160;<span class="comment">      frustum will appear unchanged in the new frustum.</span></div>
<div class="line"><a name="l00469"></a><span class="lineno">  469</span>&#160;<span class="comment">  bool</span></div>
<div class="line"><a name="l00470"></a><span class="lineno">  470</span>&#160;<span class="comment">    Returns true if the returned viewport has a frustum</span></div>
<div class="line"><a name="l00471"></a><span class="lineno">  471</span>&#160;<span class="comment">    with the specified symmetries.</span></div>
<div class="line"><a name="l00472"></a><span class="lineno">  472</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l00473"></a><span class="lineno">  473</span>&#160;  <span class="keywordtype">bool</span> ChangeToSymmetricFrustum( </div>
<div class="line"><a name="l00474"></a><span class="lineno">  474</span>&#160;    <span class="keywordtype">bool</span> bLeftRightSymmetric, </div>
<div class="line"><a name="l00475"></a><span class="lineno">  475</span>&#160;    <span class="keywordtype">bool</span> bTopBottomSymmetric,</div>
<div class="line"><a name="l00476"></a><span class="lineno">  476</span>&#160;    <span class="keywordtype">double</span> target_distance</div>
<div class="line"><a name="l00477"></a><span class="lineno">  477</span>&#160;    );</div>
<div class="line"><a name="l00478"></a><span class="lineno">  478</span>&#160; </div>
<div class="line"><a name="l00479"></a><span class="lineno">  479</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l00480"></a><span class="lineno">  480</span>&#160;<span class="comment">  Description:</span></div>
<div class="line"><a name="l00481"></a><span class="lineno">  481</span>&#160;<span class="comment">    Get near and far clipping distances of a point</span></div>
<div class="line"><a name="l00482"></a><span class="lineno">  482</span>&#160;<span class="comment">  Parameters:</span></div>
<div class="line"><a name="l00483"></a><span class="lineno">  483</span>&#160;<span class="comment">    point - [in] </span></div>
<div class="line"><a name="l00484"></a><span class="lineno">  484</span>&#160;<span class="comment">    near_dist - [out] </span></div>
<div class="line"><a name="l00485"></a><span class="lineno">  485</span>&#160;<span class="comment">      near distance of the point (can be &lt; 0)</span></div>
<div class="line"><a name="l00486"></a><span class="lineno">  486</span>&#160;<span class="comment">    far_dist - [out] </span></div>
<div class="line"><a name="l00487"></a><span class="lineno">  487</span>&#160;<span class="comment">      far distance of the point (can be equal to near_dist)</span></div>
<div class="line"><a name="l00488"></a><span class="lineno">  488</span>&#160;<span class="comment">    bGrowNearFar - [in]</span></div>
<div class="line"><a name="l00489"></a><span class="lineno">  489</span>&#160;<span class="comment">      If true and input values of near_dist and far_dist</span></div>
<div class="line"><a name="l00490"></a><span class="lineno">  490</span>&#160;<span class="comment">      are not ON_UNSET_VALUE, the near_dist and far_dist</span></div>
<div class="line"><a name="l00491"></a><span class="lineno">  491</span>&#160;<span class="comment">      are enlarged to include bbox.</span></div>
<div class="line"><a name="l00492"></a><span class="lineno">  492</span>&#160;<span class="comment">  Returns:</span></div>
<div class="line"><a name="l00493"></a><span class="lineno">  493</span>&#160;<span class="comment">    True if the point is ing the view frustum and</span></div>
<div class="line"><a name="l00494"></a><span class="lineno">  494</span>&#160;<span class="comment">    near_dist/far_dist were set.</span></div>
<div class="line"><a name="l00495"></a><span class="lineno">  495</span>&#160;<span class="comment">    False if the bounding box does not intesect the</span></div>
<div class="line"><a name="l00496"></a><span class="lineno">  496</span>&#160;<span class="comment">    view frustum.</span></div>
<div class="line"><a name="l00497"></a><span class="lineno">  497</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l00498"></a><span class="lineno">  498</span>&#160;  <span class="keywordtype">bool</span> GetPointDepth(       </div>
<div class="line"><a name="l00499"></a><span class="lineno">  499</span>&#160;         <a class="code" href="class_o_n__3d_point.html">ON_3dPoint</a> point,</div>
<div class="line"><a name="l00500"></a><span class="lineno">  500</span>&#160;         <span class="keywordtype">double</span>* near_dist,</div>
<div class="line"><a name="l00501"></a><span class="lineno">  501</span>&#160;         <span class="keywordtype">double</span>* far_dist,</div>
<div class="line"><a name="l00502"></a><span class="lineno">  502</span>&#160;         <span class="keywordtype">bool</span> bGrowNearFar=<span class="keyword">false</span></div>
<div class="line"><a name="l00503"></a><span class="lineno">  503</span>&#160;         ) <span class="keyword">const</span>;</div>
<div class="line"><a name="l00504"></a><span class="lineno">  504</span>&#160; </div>
<div class="line"><a name="l00505"></a><span class="lineno">  505</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l00506"></a><span class="lineno">  506</span>&#160;<span class="comment">  Description:</span></div>
<div class="line"><a name="l00507"></a><span class="lineno">  507</span>&#160;<span class="comment">    Get the view plane depth of a point</span></div>
<div class="line"><a name="l00508"></a><span class="lineno">  508</span>&#160;<span class="comment">  Parameters:</span></div>
<div class="line"><a name="l00509"></a><span class="lineno">  509</span>&#160;<span class="comment">    point - [in] </span></div>
<div class="line"><a name="l00510"></a><span class="lineno">  510</span>&#160;<span class="comment">    view_plane_depth - [out] </span></div>
<div class="line"><a name="l00511"></a><span class="lineno">  511</span>&#160;<span class="comment">      positive values are in front of the camera and negative</span></div>
<div class="line"><a name="l00512"></a><span class="lineno">  512</span>&#160;<span class="comment">      values are behind the camera.</span></div>
<div class="line"><a name="l00513"></a><span class="lineno">  513</span>&#160;<span class="comment">      If 0 &lt;= point_depth &lt; FrustumNear(), the point&#39;s view</span></div>
<div class="line"><a name="l00514"></a><span class="lineno">  514</span>&#160;<span class="comment">      plane is between the camera and the frustum&#39;s near plane.</span></div>
<div class="line"><a name="l00515"></a><span class="lineno">  515</span>&#160;<span class="comment">      If point_depth &gt; FrustumFar(), the point&#39;s view</span></div>
<div class="line"><a name="l00516"></a><span class="lineno">  516</span>&#160;<span class="comment">      plane is farther from the camera and the frustum&#39;s far plane.</span></div>
<div class="line"><a name="l00517"></a><span class="lineno">  517</span>&#160;<span class="comment">  Returns:</span></div>
<div class="line"><a name="l00518"></a><span class="lineno">  518</span>&#160;<span class="comment">    True if the point is ing the view frustum and</span></div>
<div class="line"><a name="l00519"></a><span class="lineno">  519</span>&#160;<span class="comment">    near_dist/far_dist were set.</span></div>
<div class="line"><a name="l00520"></a><span class="lineno">  520</span>&#160;<span class="comment">    False if the bounding box does not intesect the</span></div>
<div class="line"><a name="l00521"></a><span class="lineno">  521</span>&#160;<span class="comment">    view frustum.</span></div>
<div class="line"><a name="l00522"></a><span class="lineno">  522</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l00523"></a><span class="lineno">  523</span>&#160;  <span class="keywordtype">bool</span> GetPointDepth(       </div>
<div class="line"><a name="l00524"></a><span class="lineno">  524</span>&#160;       <a class="code" href="class_o_n__3d_point.html">ON_3dPoint</a> point,</div>
<div class="line"><a name="l00525"></a><span class="lineno">  525</span>&#160;       <span class="keywordtype">double</span>* view_plane_depth</div>
<div class="line"><a name="l00526"></a><span class="lineno">  526</span>&#160;       ) <span class="keyword">const</span>;</div>
<div class="line"><a name="l00527"></a><span class="lineno">  527</span>&#160; </div>
<div class="line"><a name="l00528"></a><span class="lineno">  528</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l00529"></a><span class="lineno">  529</span>&#160;<span class="comment">  Description:</span></div>
<div class="line"><a name="l00530"></a><span class="lineno">  530</span>&#160;<span class="comment">    Get near and far clipping distances of a bounding box.</span></div>
<div class="line"><a name="l00531"></a><span class="lineno">  531</span>&#160;<span class="comment">  Parameters:</span></div>
<div class="line"><a name="l00532"></a><span class="lineno">  532</span>&#160;<span class="comment">    bbox - [in] </span></div>
<div class="line"><a name="l00533"></a><span class="lineno">  533</span>&#160;<span class="comment">      bounding box</span></div>
<div class="line"><a name="l00534"></a><span class="lineno">  534</span>&#160;<span class="comment">    near_dist - [out] </span></div>
<div class="line"><a name="l00535"></a><span class="lineno">  535</span>&#160;<span class="comment">      near distance of the box</span></div>
<div class="line"><a name="l00536"></a><span class="lineno">  536</span>&#160;<span class="comment">      This value can be zero or negative when the camera</span></div>
<div class="line"><a name="l00537"></a><span class="lineno">  537</span>&#160;<span class="comment">      location is inside bbox.</span></div>
<div class="line"><a name="l00538"></a><span class="lineno">  538</span>&#160;<span class="comment">    far_dist - [out] </span></div>
<div class="line"><a name="l00539"></a><span class="lineno">  539</span>&#160;<span class="comment">      far distance of the box</span></div>
<div class="line"><a name="l00540"></a><span class="lineno">  540</span>&#160;<span class="comment">      This value can be equal to near_dist, zero or negative </span></div>
<div class="line"><a name="l00541"></a><span class="lineno">  541</span>&#160;<span class="comment">      when the camera location is in front of the bounding box.</span></div>
<div class="line"><a name="l00542"></a><span class="lineno">  542</span>&#160;<span class="comment">    bGrowNearFar - [in]</span></div>
<div class="line"><a name="l00543"></a><span class="lineno">  543</span>&#160;<span class="comment">      If true and input values of near_dist and far_dist</span></div>
<div class="line"><a name="l00544"></a><span class="lineno">  544</span>&#160;<span class="comment">      are not ON_UNSET_VALUE, the near_dist and far_dist</span></div>
<div class="line"><a name="l00545"></a><span class="lineno">  545</span>&#160;<span class="comment">      are enlarged to include bbox.</span></div>
<div class="line"><a name="l00546"></a><span class="lineno">  546</span>&#160;<span class="comment">  Returns:</span></div>
<div class="line"><a name="l00547"></a><span class="lineno">  547</span>&#160;<span class="comment">    True if the bounding box intersects the view frustum and</span></div>
<div class="line"><a name="l00548"></a><span class="lineno">  548</span>&#160;<span class="comment">    near_dist/far_dist were set.</span></div>
<div class="line"><a name="l00549"></a><span class="lineno">  549</span>&#160;<span class="comment">    False if the bounding box does not intesect the view frustum.</span></div>
<div class="line"><a name="l00550"></a><span class="lineno">  550</span>&#160;<span class="comment">  Remarks:</span></div>
<div class="line"><a name="l00551"></a><span class="lineno">  551</span>&#160;<span class="comment">    This function ignores the current value of the viewport&#39;s </span></div>
<div class="line"><a name="l00552"></a><span class="lineno">  552</span>&#160;<span class="comment">    near and far settings. If the viewport is a perspective</span></div>
<div class="line"><a name="l00553"></a><span class="lineno">  553</span>&#160;<span class="comment">    projection, the it intersects the semi infinite frustum</span></div>
<div class="line"><a name="l00554"></a><span class="lineno">  554</span>&#160;<span class="comment">    volume with the bounding box and returns the near and far</span></div>
<div class="line"><a name="l00555"></a><span class="lineno">  555</span>&#160;<span class="comment">    distances of the intersection.  If the viewport is a parallel</span></div>
<div class="line"><a name="l00556"></a><span class="lineno">  556</span>&#160;<span class="comment">    projection, it instersects the infinte view region with the</span></div>
<div class="line"><a name="l00557"></a><span class="lineno">  557</span>&#160;<span class="comment">    bounding box and returns the near and far distances of the</span></div>
<div class="line"><a name="l00558"></a><span class="lineno">  558</span>&#160;<span class="comment">    projection.</span></div>
<div class="line"><a name="l00559"></a><span class="lineno">  559</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l00560"></a><span class="lineno">  560</span>&#160;  <span class="keywordtype">bool</span> GetBoundingBoxDepth(       </div>
<div class="line"><a name="l00561"></a><span class="lineno">  561</span>&#160;         <a class="code" href="class_o_n___bounding_box.html">ON_BoundingBox</a> bbox,</div>
<div class="line"><a name="l00562"></a><span class="lineno">  562</span>&#160;         <span class="keywordtype">double</span>* near_dist,</div>
<div class="line"><a name="l00563"></a><span class="lineno">  563</span>&#160;         <span class="keywordtype">double</span>* far_dist,</div>
<div class="line"><a name="l00564"></a><span class="lineno">  564</span>&#160;         <span class="keywordtype">bool</span> bGrowNearFar=<span class="keyword">false</span></div>
<div class="line"><a name="l00565"></a><span class="lineno">  565</span>&#160;         ) <span class="keyword">const</span>;</div>
<div class="line"><a name="l00566"></a><span class="lineno">  566</span>&#160; </div>
<div class="line"><a name="l00567"></a><span class="lineno">  567</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l00568"></a><span class="lineno">  568</span>&#160;<span class="comment">  Description:</span></div>
<div class="line"><a name="l00569"></a><span class="lineno">  569</span>&#160;<span class="comment">    Get near and far clipping distances of a bounding sphere.</span></div>
<div class="line"><a name="l00570"></a><span class="lineno">  570</span>&#160;<span class="comment">  Parameters:</span></div>
<div class="line"><a name="l00571"></a><span class="lineno">  571</span>&#160;<span class="comment">    sphere - [in] </span></div>
<div class="line"><a name="l00572"></a><span class="lineno">  572</span>&#160;<span class="comment">      bounding sphere</span></div>
<div class="line"><a name="l00573"></a><span class="lineno">  573</span>&#160;<span class="comment">    near_dist - [out] </span></div>
<div class="line"><a name="l00574"></a><span class="lineno">  574</span>&#160;<span class="comment">      near distance of the sphere (can be &lt; 0)</span></div>
<div class="line"><a name="l00575"></a><span class="lineno">  575</span>&#160;<span class="comment">    far_dist - [out] </span></div>
<div class="line"><a name="l00576"></a><span class="lineno">  576</span>&#160;<span class="comment">      far distance of the sphere (can be equal to near_dist)</span></div>
<div class="line"><a name="l00577"></a><span class="lineno">  577</span>&#160;<span class="comment">    bGrowNearFar - [in]</span></div>
<div class="line"><a name="l00578"></a><span class="lineno">  578</span>&#160;<span class="comment">      If true and input values of near_dist and far_dist</span></div>
<div class="line"><a name="l00579"></a><span class="lineno">  579</span>&#160;<span class="comment">      are not ON_UNSET_VALUE, the near_dist and far_dist</span></div>
<div class="line"><a name="l00580"></a><span class="lineno">  580</span>&#160;<span class="comment">      are enlarged to include bbox.</span></div>
<div class="line"><a name="l00581"></a><span class="lineno">  581</span>&#160;<span class="comment">  Returns:</span></div>
<div class="line"><a name="l00582"></a><span class="lineno">  582</span>&#160;<span class="comment">    True if the sphere intersects the view frustum and</span></div>
<div class="line"><a name="l00583"></a><span class="lineno">  583</span>&#160;<span class="comment">    near_dist/far_dist were set.</span></div>
<div class="line"><a name="l00584"></a><span class="lineno">  584</span>&#160;<span class="comment">    False if the sphere does not intesect the view frustum.</span></div>
<div class="line"><a name="l00585"></a><span class="lineno">  585</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l00586"></a><span class="lineno">  586</span>&#160;  <span class="keywordtype">bool</span> GetSphereDepth( </div>
<div class="line"><a name="l00587"></a><span class="lineno">  587</span>&#160;         <a class="code" href="class_o_n___sphere.html">ON_Sphere</a> sphere,</div>
<div class="line"><a name="l00588"></a><span class="lineno">  588</span>&#160;         <span class="keywordtype">double</span>* near_dist,</div>
<div class="line"><a name="l00589"></a><span class="lineno">  589</span>&#160;         <span class="keywordtype">double</span>* far_dist,</div>
<div class="line"><a name="l00590"></a><span class="lineno">  590</span>&#160;         <span class="keywordtype">bool</span> bGrowNearFar=<span class="keyword">false</span></div>
<div class="line"><a name="l00591"></a><span class="lineno">  591</span>&#160;         ) <span class="keyword">const</span>;</div>
<div class="line"><a name="l00592"></a><span class="lineno">  592</span>&#160; </div>
<div class="line"><a name="l00593"></a><span class="lineno">  593</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l00594"></a><span class="lineno">  594</span>&#160;<span class="comment">  Description:</span></div>
<div class="line"><a name="l00595"></a><span class="lineno">  595</span>&#160;<span class="comment">    Set near and far clipping distance subject to constraints.</span></div>
<div class="line"><a name="l00596"></a><span class="lineno">  596</span>&#160;<span class="comment">  Parameters:</span></div>
<div class="line"><a name="l00597"></a><span class="lineno">  597</span>&#160;<span class="comment">    near_dist - [in] (&gt;0) desired near clipping distance</span></div>
<div class="line"><a name="l00598"></a><span class="lineno">  598</span>&#160;<span class="comment">    far_dist - [in] (&gt;near_dist) desired near clipping distance</span></div>
<div class="line"><a name="l00599"></a><span class="lineno">  599</span>&#160;<span class="comment">    min_near_dist - [in] </span></div>
<div class="line"><a name="l00600"></a><span class="lineno">  600</span>&#160;<span class="comment">      If min_near_dist &lt;= 0.0, it is ignored.</span></div>
<div class="line"><a name="l00601"></a><span class="lineno">  601</span>&#160;<span class="comment">      If min_near_dist &gt; 0 and near_dist &lt; min_near_dist, </span></div>
<div class="line"><a name="l00602"></a><span class="lineno">  602</span>&#160;<span class="comment">      then the frustum&#39;s near_dist will be increased to </span></div>
<div class="line"><a name="l00603"></a><span class="lineno">  603</span>&#160;<span class="comment">      min_near_dist.</span></div>
<div class="line"><a name="l00604"></a><span class="lineno">  604</span>&#160;<span class="comment">    min_near_over_far - [in] </span></div>
<div class="line"><a name="l00605"></a><span class="lineno">  605</span>&#160;<span class="comment">      If min_near_over_far &lt;= 0.0, it is ignored.</span></div>
<div class="line"><a name="l00606"></a><span class="lineno">  606</span>&#160;<span class="comment">      If near_dist &lt; far_dist*min_near_over_far, then</span></div>
<div class="line"><a name="l00607"></a><span class="lineno">  607</span>&#160;<span class="comment">      near_dist is increased and/or far_dist is decreased</span></div>
<div class="line"><a name="l00608"></a><span class="lineno">  608</span>&#160;<span class="comment">      so that near_dist = far_dist*min_near_over_far.</span></div>
<div class="line"><a name="l00609"></a><span class="lineno">  609</span>&#160;<span class="comment">      If near_dist &lt; target_dist &lt; far_dist, then near_dist</span></div>
<div class="line"><a name="l00610"></a><span class="lineno">  610</span>&#160;<span class="comment">      near_dist is increased and far_dist is decreased so that</span></div>
<div class="line"><a name="l00611"></a><span class="lineno">  611</span>&#160;<span class="comment">      projection precision will be good at target_dist.</span></div>
<div class="line"><a name="l00612"></a><span class="lineno">  612</span>&#160;<span class="comment">      Otherwise, near_dist is simply set to </span></div>
<div class="line"><a name="l00613"></a><span class="lineno">  613</span>&#160;<span class="comment">      far_dist*min_near_over_far.</span></div>
<div class="line"><a name="l00614"></a><span class="lineno">  614</span>&#160;<span class="comment">    target_dist - [in]  </span></div>
<div class="line"><a name="l00615"></a><span class="lineno">  615</span>&#160;<span class="comment">      If target_dist &lt;= 0.0, it is ignored.</span></div>
<div class="line"><a name="l00616"></a><span class="lineno">  616</span>&#160;<span class="comment">      If target_dist &gt; 0, it is used as described in the</span></div>
<div class="line"><a name="l00617"></a><span class="lineno">  617</span>&#160;<span class="comment">      description of the min_near_over_far parameter.</span></div>
<div class="line"><a name="l00618"></a><span class="lineno">  618</span>&#160;<span class="comment">    relative_depth_bias - [in]</span></div>
<div class="line"><a name="l00619"></a><span class="lineno">  619</span>&#160;<span class="comment">      If relative_depth_bias &lt;= 0.0, it is ignored.</span></div>
<div class="line"><a name="l00620"></a><span class="lineno">  620</span>&#160;<span class="comment">      If relative_depth_bias &gt; 0, it is assumed that</span></div>
<div class="line"><a name="l00621"></a><span class="lineno">  621</span>&#160;<span class="comment">      the requested near_dist and far_dist were calculated</span></div>
<div class="line"><a name="l00622"></a><span class="lineno">  622</span>&#160;<span class="comment">      assuming no depth bias and the values will be</span></div>
<div class="line"><a name="l00623"></a><span class="lineno">  623</span>&#160;<span class="comment">      appropriately adjusted to ensure the frustum&#39;s </span></div>
<div class="line"><a name="l00624"></a><span class="lineno">  624</span>&#160;<span class="comment">      near and far clipping planes will not clip biased</span></div>
<div class="line"><a name="l00625"></a><span class="lineno">  625</span>&#160;<span class="comment">      objects.</span></div>
<div class="line"><a name="l00626"></a><span class="lineno">  626</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l00627"></a><span class="lineno">  627</span>&#160;  <span class="keywordtype">bool</span> SetFrustumNearFar( </div>
<div class="line"><a name="l00628"></a><span class="lineno">  628</span>&#160;         <span class="keywordtype">double</span> near_dist,</div>
<div class="line"><a name="l00629"></a><span class="lineno">  629</span>&#160;         <span class="keywordtype">double</span> far_dist,</div>
<div class="line"><a name="l00630"></a><span class="lineno">  630</span>&#160;         <span class="keywordtype">double</span> min_near_dist,</div>
<div class="line"><a name="l00631"></a><span class="lineno">  631</span>&#160;         <span class="keywordtype">double</span> min_near_over_far,</div>
<div class="line"><a name="l00632"></a><span class="lineno">  632</span>&#160;         <span class="keywordtype">double</span> target_dist</div>
<div class="line"><a name="l00633"></a><span class="lineno">  633</span>&#160;         );</div>
<div class="line"><a name="l00634"></a><span class="lineno">  634</span>&#160; </div>
<div class="line"><a name="l00635"></a><span class="lineno">  635</span>&#160;  <span class="keywordtype">bool</span> SetFrustumNearFar( </div>
<div class="line"><a name="l00636"></a><span class="lineno">  636</span>&#160;         <span class="keywordtype">double</span> near_dist,</div>
<div class="line"><a name="l00637"></a><span class="lineno">  637</span>&#160;         <span class="keywordtype">double</span> far_dist,</div>
<div class="line"><a name="l00638"></a><span class="lineno">  638</span>&#160;         <span class="keywordtype">double</span> min_near_dist,</div>
<div class="line"><a name="l00639"></a><span class="lineno">  639</span>&#160;         <span class="keywordtype">double</span> min_near_over_far,</div>
<div class="line"><a name="l00640"></a><span class="lineno">  640</span>&#160;         <span class="keywordtype">double</span> target_dist,</div>
<div class="line"><a name="l00641"></a><span class="lineno">  641</span>&#160;         <span class="keywordtype">double</span> relative_depth_bias</div>
<div class="line"><a name="l00642"></a><span class="lineno">  642</span>&#160;         );</div>
<div class="line"><a name="l00643"></a><span class="lineno">  643</span>&#160; </div>
<div class="line"><a name="l00644"></a><span class="lineno">  644</span>&#160;  <span class="comment">// Description:</span></div>
<div class="line"><a name="l00645"></a><span class="lineno">  645</span>&#160;  <span class="comment">//   Get near clipping plane.</span></div>
<div class="line"><a name="l00646"></a><span class="lineno">  646</span>&#160;  <span class="comment">//</span></div>
<div class="line"><a name="l00647"></a><span class="lineno">  647</span>&#160;  <span class="comment">//  near_plane - [out] near clipping plane if camera and frustum</span></div>
<div class="line"><a name="l00648"></a><span class="lineno">  648</span>&#160;  <span class="comment">//      are valid.  The plane&#39;s frame is the same as the camera&#39;s</span></div>
<div class="line"><a name="l00649"></a><span class="lineno">  649</span>&#160;  <span class="comment">//      frame.  The origin is located at the intersection of the</span></div>
<div class="line"><a name="l00650"></a><span class="lineno">  650</span>&#160;  <span class="comment">//      camera direction ray and the near clipping plane. The plane&#39;s</span></div>
<div class="line"><a name="l00651"></a><span class="lineno">  651</span>&#160;  <span class="comment">//      normal points out of the frustum towards the camera</span></div>
<div class="line"><a name="l00652"></a><span class="lineno">  652</span>&#160;  <span class="comment">//      location.</span></div>
<div class="line"><a name="l00653"></a><span class="lineno">  653</span>&#160;  <span class="comment">//</span></div>
<div class="line"><a name="l00654"></a><span class="lineno">  654</span>&#160;  <span class="comment">// Returns:</span></div>
<div class="line"><a name="l00655"></a><span class="lineno">  655</span>&#160;  <span class="comment">//   true if camera and frustum are valid.</span></div>
<div class="line"><a name="l00656"></a><span class="lineno">  656</span>&#160;  <span class="keywordtype">bool</span> GetNearPlane( </div>
<div class="line"><a name="l00657"></a><span class="lineno">  657</span>&#160;    <a class="code" href="class_o_n___plane.html">ON_Plane</a>&amp; near_plane </div>
<div class="line"><a name="l00658"></a><span class="lineno">  658</span>&#160;    ) <span class="keyword">const</span>;</div>
<div class="line"><a name="l00659"></a><span class="lineno">  659</span>&#160; </div>
<div class="line"><a name="l00660"></a><span class="lineno">  660</span>&#160;  <span class="keywordtype">bool</span> GetNearPlaneEquation( </div>
<div class="line"><a name="l00661"></a><span class="lineno">  661</span>&#160;    <a class="code" href="class_o_n___plane_equation.html">ON_PlaneEquation</a>&amp; near_plane_equation </div>
<div class="line"><a name="l00662"></a><span class="lineno">  662</span>&#160;    ) <span class="keyword">const</span>;</div>
<div class="line"><a name="l00663"></a><span class="lineno">  663</span>&#160; </div>
<div class="line"><a name="l00664"></a><span class="lineno">  664</span>&#160;  <span class="comment">// Description:</span></div>
<div class="line"><a name="l00665"></a><span class="lineno">  665</span>&#160;  <span class="comment">//   Get far clipping plane.</span></div>
<div class="line"><a name="l00666"></a><span class="lineno">  666</span>&#160;  <span class="comment">//</span></div>
<div class="line"><a name="l00667"></a><span class="lineno">  667</span>&#160;  <span class="comment">//  far_plane - [out] far clipping plane if camera and frustum</span></div>
<div class="line"><a name="l00668"></a><span class="lineno">  668</span>&#160;  <span class="comment">//      are valid.  The plane&#39;s frame is the same as the camera&#39;s</span></div>
<div class="line"><a name="l00669"></a><span class="lineno">  669</span>&#160;  <span class="comment">//      frame.  The origin is located at the intersection of the</span></div>
<div class="line"><a name="l00670"></a><span class="lineno">  670</span>&#160;  <span class="comment">//      camera direction ray and the far clipping plane. The plane&#39;s</span></div>
<div class="line"><a name="l00671"></a><span class="lineno">  671</span>&#160;  <span class="comment">//      normal points into the frustum towards the camera location.</span></div>
<div class="line"><a name="l00672"></a><span class="lineno">  672</span>&#160;  <span class="comment">//</span></div>
<div class="line"><a name="l00673"></a><span class="lineno">  673</span>&#160;  <span class="comment">// Returns:</span></div>
<div class="line"><a name="l00674"></a><span class="lineno">  674</span>&#160;  <span class="comment">//   true if camera and frustum are valid.</span></div>
<div class="line"><a name="l00675"></a><span class="lineno">  675</span>&#160;  <span class="keywordtype">bool</span> GetFarPlane( </div>
<div class="line"><a name="l00676"></a><span class="lineno">  676</span>&#160;    <a class="code" href="class_o_n___plane.html">ON_Plane</a>&amp; far_plane </div>
<div class="line"><a name="l00677"></a><span class="lineno">  677</span>&#160;    ) <span class="keyword">const</span>;</div>
<div class="line"><a name="l00678"></a><span class="lineno">  678</span>&#160; </div>
<div class="line"><a name="l00679"></a><span class="lineno">  679</span>&#160;  <span class="keywordtype">bool</span> GetFarPlaneEquation( </div>
<div class="line"><a name="l00680"></a><span class="lineno">  680</span>&#160;    <a class="code" href="class_o_n___plane_equation.html">ON_PlaneEquation</a>&amp; far_plane_equation </div>
<div class="line"><a name="l00681"></a><span class="lineno">  681</span>&#160;    ) <span class="keyword">const</span>;</div>
<div class="line"><a name="l00682"></a><span class="lineno">  682</span>&#160; </div>
<div class="line"><a name="l00683"></a><span class="lineno">  683</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l00684"></a><span class="lineno">  684</span>&#160;<span class="comment">  Description:</span></div>
<div class="line"><a name="l00685"></a><span class="lineno">  685</span>&#160;<span class="comment">    Get the plane that is a specified distance from the camera.</span></div>
<div class="line"><a name="l00686"></a><span class="lineno">  686</span>&#160;<span class="comment">    This plane is parallel to the frustum&#39;s near and far planes.</span></div>
<div class="line"><a name="l00687"></a><span class="lineno">  687</span>&#160;<span class="comment">  Parameters:</span></div>
<div class="line"><a name="l00688"></a><span class="lineno">  688</span>&#160;<span class="comment">    view_plane_depth - [in]</span></div>
<div class="line"><a name="l00689"></a><span class="lineno">  689</span>&#160;<span class="comment">      The distance from the camera location to the view plane. </span></div>
<div class="line"><a name="l00690"></a><span class="lineno">  690</span>&#160;<span class="comment">      Positive distances are in front of the camera and</span></div>
<div class="line"><a name="l00691"></a><span class="lineno">  691</span>&#160;<span class="comment">      negative distances are behind the camera.</span></div>
<div class="line"><a name="l00692"></a><span class="lineno">  692</span>&#160;<span class="comment">      A value of FrustumNear() will return the frustum&#39;s</span></div>
<div class="line"><a name="l00693"></a><span class="lineno">  693</span>&#160;<span class="comment">      near plane and a valud of FrustumFar() will return</span></div>
<div class="line"><a name="l00694"></a><span class="lineno">  694</span>&#160;<span class="comment">      the frustum&#39;s far plane.</span></div>
<div class="line"><a name="l00695"></a><span class="lineno">  695</span>&#160;<span class="comment">    view_plane - [out]</span></div>
<div class="line"><a name="l00696"></a><span class="lineno">  696</span>&#160;<span class="comment">      View plane</span></div>
<div class="line"><a name="l00697"></a><span class="lineno">  697</span>&#160;<span class="comment">    view_plane_equation - [out]</span></div>
<div class="line"><a name="l00698"></a><span class="lineno">  698</span>&#160;<span class="comment">      Equation of the view plane.</span></div>
<div class="line"><a name="l00699"></a><span class="lineno">  699</span>&#160;<span class="comment">  Returns:</span></div>
<div class="line"><a name="l00700"></a><span class="lineno">  700</span>&#160;<span class="comment">    True if the camera and frustum are valid and view_plane</span></div>
<div class="line"><a name="l00701"></a><span class="lineno">  701</span>&#160;<span class="comment">    was calculated.  False otherwise.</span></div>
<div class="line"><a name="l00702"></a><span class="lineno">  702</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l00703"></a><span class="lineno">  703</span>&#160;  <span class="keywordtype">bool</span> GetViewPlane( </div>
<div class="line"><a name="l00704"></a><span class="lineno">  704</span>&#160;    <span class="keywordtype">double</span> view_plane_depth,</div>
<div class="line"><a name="l00705"></a><span class="lineno">  705</span>&#160;    <a class="code" href="class_o_n___plane.html">ON_Plane</a>&amp; view_plane </div>
<div class="line"><a name="l00706"></a><span class="lineno">  706</span>&#160;    ) <span class="keyword">const</span>;</div>
<div class="line"><a name="l00707"></a><span class="lineno">  707</span>&#160; </div>
<div class="line"><a name="l00708"></a><span class="lineno">  708</span>&#160;  <span class="keywordtype">bool</span> GetViewPlaneEquation( </div>
<div class="line"><a name="l00709"></a><span class="lineno">  709</span>&#160;    <span class="keywordtype">double</span> view_plane_depth,</div>
<div class="line"><a name="l00710"></a><span class="lineno">  710</span>&#160;    <a class="code" href="class_o_n___plane_equation.html">ON_PlaneEquation</a>&amp; view_plane_equation </div>
<div class="line"><a name="l00711"></a><span class="lineno">  711</span>&#160;    ) <span class="keyword">const</span>;</div>
<div class="line"><a name="l00712"></a><span class="lineno">  712</span>&#160; </div>
<div class="line"><a name="l00713"></a><span class="lineno">  713</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l00714"></a><span class="lineno">  714</span>&#160;<span class="comment">  Description:</span></div>
<div class="line"><a name="l00715"></a><span class="lineno">  715</span>&#160;<span class="comment">  Get left world frustum clipping plane.</span></div>
<div class="line"><a name="l00716"></a><span class="lineno">  716</span>&#160;<span class="comment">  Parameters:</span></div>
<div class="line"><a name="l00717"></a><span class="lineno">  717</span>&#160;<span class="comment">    left_plane - [out] </span></div>
<div class="line"><a name="l00718"></a><span class="lineno">  718</span>&#160;<span class="comment">      frustum left side clipping plane.  The normal points</span></div>
<div class="line"><a name="l00719"></a><span class="lineno">  719</span>&#160;<span class="comment">      into the visible region of the frustum.  If the projection</span></div>
<div class="line"><a name="l00720"></a><span class="lineno">  720</span>&#160;<span class="comment">      is perspective, the origin is at the camera location,</span></div>
<div class="line"><a name="l00721"></a><span class="lineno">  721</span>&#160;<span class="comment">      otherwise the origin isthe point on the plane that is</span></div>
<div class="line"><a name="l00722"></a><span class="lineno">  722</span>&#160;<span class="comment">      closest to the camera location.</span></div>
<div class="line"><a name="l00723"></a><span class="lineno">  723</span>&#160;<span class="comment">  Returns:</span></div>
<div class="line"><a name="l00724"></a><span class="lineno">  724</span>&#160;<span class="comment">    True if camera and frustum are valid and plane was set.</span></div>
<div class="line"><a name="l00725"></a><span class="lineno">  725</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l00726"></a><span class="lineno">  726</span>&#160;  <span class="keywordtype">bool</span> GetFrustumLeftPlane( </div>
<div class="line"><a name="l00727"></a><span class="lineno">  727</span>&#160;    <a class="code" href="class_o_n___plane.html">ON_Plane</a>&amp; left_plane </div>
<div class="line"><a name="l00728"></a><span class="lineno">  728</span>&#160;    ) <span class="keyword">const</span>;</div>
<div class="line"><a name="l00729"></a><span class="lineno">  729</span>&#160; </div>
<div class="line"><a name="l00730"></a><span class="lineno">  730</span>&#160;  <span class="keywordtype">bool</span> GetFrustumLeftPlaneEquation( </div>
<div class="line"><a name="l00731"></a><span class="lineno">  731</span>&#160;    <a class="code" href="class_o_n___plane_equation.html">ON_PlaneEquation</a>&amp; left_plane_equation </div>
<div class="line"><a name="l00732"></a><span class="lineno">  732</span>&#160;    ) <span class="keyword">const</span>;</div>
<div class="line"><a name="l00733"></a><span class="lineno">  733</span>&#160; </div>
<div class="line"><a name="l00734"></a><span class="lineno">  734</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l00735"></a><span class="lineno">  735</span>&#160;<span class="comment">  Description:</span></div>
<div class="line"><a name="l00736"></a><span class="lineno">  736</span>&#160;<span class="comment">  Get right world frustum clipping plane.</span></div>
<div class="line"><a name="l00737"></a><span class="lineno">  737</span>&#160;<span class="comment">  Parameters:</span></div>
<div class="line"><a name="l00738"></a><span class="lineno">  738</span>&#160;<span class="comment">    right_plane - [out] </span></div>
<div class="line"><a name="l00739"></a><span class="lineno">  739</span>&#160;<span class="comment">      frustum right side clipping plane.  The normal points</span></div>
<div class="line"><a name="l00740"></a><span class="lineno">  740</span>&#160;<span class="comment">      into the visible region of the frustum.  If the projection</span></div>
<div class="line"><a name="l00741"></a><span class="lineno">  741</span>&#160;<span class="comment">      is perspective, the origin is at the camera location,</span></div>
<div class="line"><a name="l00742"></a><span class="lineno">  742</span>&#160;<span class="comment">      otherwise the origin isthe point on the plane that is</span></div>
<div class="line"><a name="l00743"></a><span class="lineno">  743</span>&#160;<span class="comment">      closest to the camera location.</span></div>
<div class="line"><a name="l00744"></a><span class="lineno">  744</span>&#160;<span class="comment">  Returns:</span></div>
<div class="line"><a name="l00745"></a><span class="lineno">  745</span>&#160;<span class="comment">    True if camera and frustum are valid and plane was set.</span></div>
<div class="line"><a name="l00746"></a><span class="lineno">  746</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l00747"></a><span class="lineno">  747</span>&#160;  <span class="keywordtype">bool</span> GetFrustumRightPlane( </div>
<div class="line"><a name="l00748"></a><span class="lineno">  748</span>&#160;    <a class="code" href="class_o_n___plane.html">ON_Plane</a>&amp; right_plane </div>
<div class="line"><a name="l00749"></a><span class="lineno">  749</span>&#160;    ) <span class="keyword">const</span>;</div>
<div class="line"><a name="l00750"></a><span class="lineno">  750</span>&#160; </div>
<div class="line"><a name="l00751"></a><span class="lineno">  751</span>&#160;  <span class="keywordtype">bool</span> GetFrustumRightPlaneEquation( </div>
<div class="line"><a name="l00752"></a><span class="lineno">  752</span>&#160;    <a class="code" href="class_o_n___plane_equation.html">ON_PlaneEquation</a>&amp; right_plane_equation </div>
<div class="line"><a name="l00753"></a><span class="lineno">  753</span>&#160;    ) <span class="keyword">const</span>;</div>
<div class="line"><a name="l00754"></a><span class="lineno">  754</span>&#160; </div>
<div class="line"><a name="l00755"></a><span class="lineno">  755</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l00756"></a><span class="lineno">  756</span>&#160;<span class="comment">  Description:</span></div>
<div class="line"><a name="l00757"></a><span class="lineno">  757</span>&#160;<span class="comment">  Get right world frustum clipping plane.</span></div>
<div class="line"><a name="l00758"></a><span class="lineno">  758</span>&#160;<span class="comment">  Parameters:</span></div>
<div class="line"><a name="l00759"></a><span class="lineno">  759</span>&#160;<span class="comment">    right_plane - [out] </span></div>
<div class="line"><a name="l00760"></a><span class="lineno">  760</span>&#160;<span class="comment">      frustum bottom side clipping plane.  The normal points</span></div>
<div class="line"><a name="l00761"></a><span class="lineno">  761</span>&#160;<span class="comment">      into the visible region of the frustum.  If the projection</span></div>
<div class="line"><a name="l00762"></a><span class="lineno">  762</span>&#160;<span class="comment">      is perspective, the origin is at the camera location,</span></div>
<div class="line"><a name="l00763"></a><span class="lineno">  763</span>&#160;<span class="comment">      otherwise the origin isthe point on the plane that is</span></div>
<div class="line"><a name="l00764"></a><span class="lineno">  764</span>&#160;<span class="comment">      closest to the camera location.</span></div>
<div class="line"><a name="l00765"></a><span class="lineno">  765</span>&#160;<span class="comment">  Returns:</span></div>
<div class="line"><a name="l00766"></a><span class="lineno">  766</span>&#160;<span class="comment">    True if camera and frustum are valid and plane was set.</span></div>
<div class="line"><a name="l00767"></a><span class="lineno">  767</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l00768"></a><span class="lineno">  768</span>&#160;  <span class="keywordtype">bool</span> GetFrustumBottomPlane( </div>
<div class="line"><a name="l00769"></a><span class="lineno">  769</span>&#160;    <a class="code" href="class_o_n___plane.html">ON_Plane</a>&amp; bottom_plane </div>
<div class="line"><a name="l00770"></a><span class="lineno">  770</span>&#160;    ) <span class="keyword">const</span>;</div>
<div class="line"><a name="l00771"></a><span class="lineno">  771</span>&#160; </div>
<div class="line"><a name="l00772"></a><span class="lineno">  772</span>&#160;  <span class="keywordtype">bool</span> GetFrustumBottomPlaneEquation( </div>
<div class="line"><a name="l00773"></a><span class="lineno">  773</span>&#160;    <a class="code" href="class_o_n___plane_equation.html">ON_PlaneEquation</a>&amp; bottom_plane_equation </div>
<div class="line"><a name="l00774"></a><span class="lineno">  774</span>&#160;    ) <span class="keyword">const</span>;</div>
<div class="line"><a name="l00775"></a><span class="lineno">  775</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l00776"></a><span class="lineno">  776</span>&#160;<span class="comment">  Description:</span></div>
<div class="line"><a name="l00777"></a><span class="lineno">  777</span>&#160;<span class="comment">  Get right world frustum clipping plane.</span></div>
<div class="line"><a name="l00778"></a><span class="lineno">  778</span>&#160;<span class="comment">  Parameters:</span></div>
<div class="line"><a name="l00779"></a><span class="lineno">  779</span>&#160;<span class="comment">    top_plane - [out] </span></div>
<div class="line"><a name="l00780"></a><span class="lineno">  780</span>&#160;<span class="comment">      frustum top side clipping plane.  The normal points</span></div>
<div class="line"><a name="l00781"></a><span class="lineno">  781</span>&#160;<span class="comment">      into the visible region of the frustum.  If the projection</span></div>
<div class="line"><a name="l00782"></a><span class="lineno">  782</span>&#160;<span class="comment">      is perspective, the origin is at the camera location,</span></div>
<div class="line"><a name="l00783"></a><span class="lineno">  783</span>&#160;<span class="comment">      otherwise the origin isthe point on the plane that is</span></div>
<div class="line"><a name="l00784"></a><span class="lineno">  784</span>&#160;<span class="comment">      closest to the camera location.</span></div>
<div class="line"><a name="l00785"></a><span class="lineno">  785</span>&#160;<span class="comment">  Returns:</span></div>
<div class="line"><a name="l00786"></a><span class="lineno">  786</span>&#160;<span class="comment">    True if camera and frustum are valid and plane was set.</span></div>
<div class="line"><a name="l00787"></a><span class="lineno">  787</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l00788"></a><span class="lineno">  788</span>&#160;  <span class="keywordtype">bool</span> GetFrustumTopPlane( </div>
<div class="line"><a name="l00789"></a><span class="lineno">  789</span>&#160;    <a class="code" href="class_o_n___plane.html">ON_Plane</a>&amp; top_plane </div>
<div class="line"><a name="l00790"></a><span class="lineno">  790</span>&#160;    ) <span class="keyword">const</span>;</div>
<div class="line"><a name="l00791"></a><span class="lineno">  791</span>&#160; </div>
<div class="line"><a name="l00792"></a><span class="lineno">  792</span>&#160;  <span class="keywordtype">bool</span> GetFrustumTopPlaneEquation( </div>
<div class="line"><a name="l00793"></a><span class="lineno">  793</span>&#160;    <a class="code" href="class_o_n___plane_equation.html">ON_PlaneEquation</a>&amp; top_plane_equation </div>
<div class="line"><a name="l00794"></a><span class="lineno">  794</span>&#160;    ) <span class="keyword">const</span>;</div>
<div class="line"><a name="l00795"></a><span class="lineno">  795</span>&#160; </div>
<div class="line"><a name="l00796"></a><span class="lineno">  796</span>&#160;  <span class="comment">// Description:</span></div>
<div class="line"><a name="l00797"></a><span class="lineno">  797</span>&#160;  <span class="comment">//   Get corners of near clipping plane rectangle.</span></div>
<div class="line"><a name="l00798"></a><span class="lineno">  798</span>&#160;  <span class="comment">//</span></div>
<div class="line"><a name="l00799"></a><span class="lineno">  799</span>&#160;  <span class="comment">// Parameters:</span></div>
<div class="line"><a name="l00800"></a><span class="lineno">  800</span>&#160;  <span class="comment">//   left_bottom - [out] </span></div>
<div class="line"><a name="l00801"></a><span class="lineno">  801</span>&#160;  <span class="comment">//   right_bottom - [out]</span></div>
<div class="line"><a name="l00802"></a><span class="lineno">  802</span>&#160;  <span class="comment">//   left_top - [out]</span></div>
<div class="line"><a name="l00803"></a><span class="lineno">  803</span>&#160;  <span class="comment">//   right_top - [out]</span></div>
<div class="line"><a name="l00804"></a><span class="lineno">  804</span>&#160;  <span class="comment">//</span></div>
<div class="line"><a name="l00805"></a><span class="lineno">  805</span>&#160;  <span class="comment">// Returns:</span></div>
<div class="line"><a name="l00806"></a><span class="lineno">  806</span>&#160;  <span class="comment">//   true if camera and frustum are valid.</span></div>
<div class="line"><a name="l00807"></a><span class="lineno">  807</span>&#160;  <span class="keywordtype">bool</span> GetNearRect( </div>
<div class="line"><a name="l00808"></a><span class="lineno">  808</span>&#160;          <a class="code" href="class_o_n__3d_point.html">ON_3dPoint</a>&amp; left_bottom,</div>
<div class="line"><a name="l00809"></a><span class="lineno">  809</span>&#160;          <a class="code" href="class_o_n__3d_point.html">ON_3dPoint</a>&amp; right_bottom,</div>
<div class="line"><a name="l00810"></a><span class="lineno">  810</span>&#160;          <a class="code" href="class_o_n__3d_point.html">ON_3dPoint</a>&amp; left_top,</div>
<div class="line"><a name="l00811"></a><span class="lineno">  811</span>&#160;          <a class="code" href="class_o_n__3d_point.html">ON_3dPoint</a>&amp; right_top</div>
<div class="line"><a name="l00812"></a><span class="lineno">  812</span>&#160;          ) <span class="keyword">const</span>;</div>
<div class="line"><a name="l00813"></a><span class="lineno">  813</span>&#160; </div>
<div class="line"><a name="l00814"></a><span class="lineno">  814</span>&#160;  <span class="comment">// Description:</span></div>
<div class="line"><a name="l00815"></a><span class="lineno">  815</span>&#160;  <span class="comment">//   Get corners of far clipping plane rectangle.</span></div>
<div class="line"><a name="l00816"></a><span class="lineno">  816</span>&#160;  <span class="comment">//</span></div>
<div class="line"><a name="l00817"></a><span class="lineno">  817</span>&#160;  <span class="comment">// Parameters:</span></div>
<div class="line"><a name="l00818"></a><span class="lineno">  818</span>&#160;  <span class="comment">//   left_bottom - [out] </span></div>
<div class="line"><a name="l00819"></a><span class="lineno">  819</span>&#160;  <span class="comment">//   right_bottom - [out]</span></div>
<div class="line"><a name="l00820"></a><span class="lineno">  820</span>&#160;  <span class="comment">//   left_top - [out]</span></div>
<div class="line"><a name="l00821"></a><span class="lineno">  821</span>&#160;  <span class="comment">//   right_top - [out]</span></div>
<div class="line"><a name="l00822"></a><span class="lineno">  822</span>&#160;  <span class="comment">//</span></div>
<div class="line"><a name="l00823"></a><span class="lineno">  823</span>&#160;  <span class="comment">// Returns:</span></div>
<div class="line"><a name="l00824"></a><span class="lineno">  824</span>&#160;  <span class="comment">//   true if camera and frustum are valid.</span></div>
<div class="line"><a name="l00825"></a><span class="lineno">  825</span>&#160;  <span class="keywordtype">bool</span> GetFarRect( </div>
<div class="line"><a name="l00826"></a><span class="lineno">  826</span>&#160;          <a class="code" href="class_o_n__3d_point.html">ON_3dPoint</a>&amp; left_bottom,</div>
<div class="line"><a name="l00827"></a><span class="lineno">  827</span>&#160;          <a class="code" href="class_o_n__3d_point.html">ON_3dPoint</a>&amp; right_bottom,</div>
<div class="line"><a name="l00828"></a><span class="lineno">  828</span>&#160;          <a class="code" href="class_o_n__3d_point.html">ON_3dPoint</a>&amp; left_top,</div>
<div class="line"><a name="l00829"></a><span class="lineno">  829</span>&#160;          <a class="code" href="class_o_n__3d_point.html">ON_3dPoint</a>&amp; right_top</div>
<div class="line"><a name="l00830"></a><span class="lineno">  830</span>&#160;          ) <span class="keyword">const</span>;</div>
<div class="line"><a name="l00831"></a><span class="lineno">  831</span>&#160; </div>
<div class="line"><a name="l00832"></a><span class="lineno">  832</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l00833"></a><span class="lineno">  833</span>&#160;<span class="comment">  Description:</span></div>
<div class="line"><a name="l00834"></a><span class="lineno">  834</span>&#160;<span class="comment">    Get the world coordinate corners of the rectangle of</span></div>
<div class="line"><a name="l00835"></a><span class="lineno">  835</span>&#160;<span class="comment">    a view plane that is a specified distance from the camera.</span></div>
<div class="line"><a name="l00836"></a><span class="lineno">  836</span>&#160;<span class="comment">    This rectangle is parallel to the frustum&#39;s near and far planes.</span></div>
<div class="line"><a name="l00837"></a><span class="lineno">  837</span>&#160;<span class="comment">  Parameters:</span></div>
<div class="line"><a name="l00838"></a><span class="lineno">  838</span>&#160;<span class="comment">    view_plane_depth - [in]</span></div>
<div class="line"><a name="l00839"></a><span class="lineno">  839</span>&#160;<span class="comment">      The distance from the camera location to the view plane. </span></div>
<div class="line"><a name="l00840"></a><span class="lineno">  840</span>&#160;<span class="comment">      Positive distances are in front of the camera and</span></div>
<div class="line"><a name="l00841"></a><span class="lineno">  841</span>&#160;<span class="comment">      negative distances are behind the camera.</span></div>
<div class="line"><a name="l00842"></a><span class="lineno">  842</span>&#160;<span class="comment">      A value of FrustumNear() will return the frustum&#39;s</span></div>
<div class="line"><a name="l00843"></a><span class="lineno">  843</span>&#160;<span class="comment">      near rectangle and a valud of FrustumFar() will return</span></div>
<div class="line"><a name="l00844"></a><span class="lineno">  844</span>&#160;<span class="comment">      the frustum&#39;s far rectangle.</span></div>
<div class="line"><a name="l00845"></a><span class="lineno">  845</span>&#160;<span class="comment">    left_bottom - [out]</span></div>
<div class="line"><a name="l00846"></a><span class="lineno">  846</span>&#160;<span class="comment">    right_bottom - [out]</span></div>
<div class="line"><a name="l00847"></a><span class="lineno">  847</span>&#160;<span class="comment">    left_top - [out]</span></div>
<div class="line"><a name="l00848"></a><span class="lineno">  848</span>&#160;<span class="comment">    right_top - [out]</span></div>
<div class="line"><a name="l00849"></a><span class="lineno">  849</span>&#160;<span class="comment">  Returns:</span></div>
<div class="line"><a name="l00850"></a><span class="lineno">  850</span>&#160;<span class="comment">    True if the camera and frustum are valid and view_plane</span></div>
<div class="line"><a name="l00851"></a><span class="lineno">  851</span>&#160;<span class="comment">    was calculated.  False otherwise.</span></div>
<div class="line"><a name="l00852"></a><span class="lineno">  852</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l00853"></a><span class="lineno">  853</span>&#160;  <span class="keywordtype">bool</span> GetViewPlaneRect(</div>
<div class="line"><a name="l00854"></a><span class="lineno">  854</span>&#160;          <span class="keywordtype">double</span> view_plane_depth,</div>
<div class="line"><a name="l00855"></a><span class="lineno">  855</span>&#160;          <a class="code" href="class_o_n__3d_point.html">ON_3dPoint</a>&amp; left_bottom,</div>
<div class="line"><a name="l00856"></a><span class="lineno">  856</span>&#160;          <a class="code" href="class_o_n__3d_point.html">ON_3dPoint</a>&amp; right_bottom,</div>
<div class="line"><a name="l00857"></a><span class="lineno">  857</span>&#160;          <a class="code" href="class_o_n__3d_point.html">ON_3dPoint</a>&amp; left_top,</div>
<div class="line"><a name="l00858"></a><span class="lineno">  858</span>&#160;          <a class="code" href="class_o_n__3d_point.html">ON_3dPoint</a>&amp; right_top</div>
<div class="line"><a name="l00859"></a><span class="lineno">  859</span>&#160;          ) <span class="keyword">const</span>;</div>
<div class="line"><a name="l00860"></a><span class="lineno">  860</span>&#160; </div>
<div class="line"><a name="l00861"></a><span class="lineno">  861</span>&#160; </div>
<div class="line"><a name="l00862"></a><span class="lineno">  862</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l00863"></a><span class="lineno">  863</span>&#160;<span class="comment">  Description:</span></div>
<div class="line"><a name="l00864"></a><span class="lineno">  864</span>&#160;<span class="comment">    Location of viewport in pixels.</span></div>
<div class="line"><a name="l00865"></a><span class="lineno">  865</span>&#160;<span class="comment">    These are provided so you can set the port you are using</span></div>
<div class="line"><a name="l00866"></a><span class="lineno">  866</span>&#160;<span class="comment">    and get the appropriate transformations to and from</span></div>
<div class="line"><a name="l00867"></a><span class="lineno">  867</span>&#160;<span class="comment">    screen space.</span></div>
<div class="line"><a name="l00868"></a><span class="lineno">  868</span>&#160;<span class="comment">  Parameters:</span></div>
<div class="line"><a name="l00869"></a><span class="lineno">  869</span>&#160;<span class="comment">    port_left - [in]</span></div>
<div class="line"><a name="l00870"></a><span class="lineno">  870</span>&#160;<span class="comment">    port_right - [in] (port_left != port_right)</span></div>
<div class="line"><a name="l00871"></a><span class="lineno">  871</span>&#160;<span class="comment">    port_bottom - [in]</span></div>
<div class="line"><a name="l00872"></a><span class="lineno">  872</span>&#160;<span class="comment">    port_top - [in] (port_top != port_bottom)</span></div>
<div class="line"><a name="l00873"></a><span class="lineno">  873</span>&#160;<span class="comment">    port_near - [in]</span></div>
<div class="line"><a name="l00874"></a><span class="lineno">  874</span>&#160;<span class="comment">    port_far - [in]</span></div>
<div class="line"><a name="l00875"></a><span class="lineno">  875</span>&#160;<span class="comment">  Example:</span></div>
<div class="line"><a name="l00876"></a><span class="lineno">  876</span>&#160;<span class="comment"></span> </div>
<div class="line"><a name="l00877"></a><span class="lineno">  877</span>&#160;<span class="comment">          // For a Windows window</span></div>
<div class="line"><a name="l00878"></a><span class="lineno">  878</span>&#160;<span class="comment">          int width = width of window client area in pixels;</span></div>
<div class="line"><a name="l00879"></a><span class="lineno">  879</span>&#160;<span class="comment">          int height = height of window client area in pixels;</span></div>
<div class="line"><a name="l00880"></a><span class="lineno">  880</span>&#160;<span class="comment">          port_left = 0;</span></div>
<div class="line"><a name="l00881"></a><span class="lineno">  881</span>&#160;<span class="comment">          port_right = width;</span></div>
<div class="line"><a name="l00882"></a><span class="lineno">  882</span>&#160;<span class="comment">          port_top = 0;</span></div>
<div class="line"><a name="l00883"></a><span class="lineno">  883</span>&#160;<span class="comment">          port_bottom = height;</span></div>
<div class="line"><a name="l00884"></a><span class="lineno">  884</span>&#160;<span class="comment">          port_near = 0;</span></div>
<div class="line"><a name="l00885"></a><span class="lineno">  885</span>&#160;<span class="comment">          port_far = 1;</span></div>
<div class="line"><a name="l00886"></a><span class="lineno">  886</span>&#160;<span class="comment">          SetScreenPort( port_left, port_right, </span></div>
<div class="line"><a name="l00887"></a><span class="lineno">  887</span>&#160;<span class="comment">                         port_bottom, port_top, </span></div>
<div class="line"><a name="l00888"></a><span class="lineno">  888</span>&#160;<span class="comment">                         port_near, port_far );</span></div>
<div class="line"><a name="l00889"></a><span class="lineno">  889</span>&#160;<span class="comment"></span> </div>
<div class="line"><a name="l00890"></a><span class="lineno">  890</span>&#160;<span class="comment">  Returns:</span></div>
<div class="line"><a name="l00891"></a><span class="lineno">  891</span>&#160;<span class="comment">    true if input is valid.</span></div>
<div class="line"><a name="l00892"></a><span class="lineno">  892</span>&#160;<span class="comment">  See Also:</span></div>
<div class="line"><a name="l00893"></a><span class="lineno">  893</span>&#160;<span class="comment">    ON_Viewport::GetScreenPort</span></div>
<div class="line"><a name="l00894"></a><span class="lineno">  894</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l00895"></a><span class="lineno">  895</span>&#160;  <span class="keywordtype">bool</span> SetScreenPort(</div>
<div class="line"><a name="l00896"></a><span class="lineno">  896</span>&#160;        <span class="keywordtype">int</span> port_left,</div>
<div class="line"><a name="l00897"></a><span class="lineno">  897</span>&#160;        <span class="keywordtype">int</span> port_right,</div>
<div class="line"><a name="l00898"></a><span class="lineno">  898</span>&#160;        <span class="keywordtype">int</span> port_bottom,</div>
<div class="line"><a name="l00899"></a><span class="lineno">  899</span>&#160;        <span class="keywordtype">int</span> port_top,</div>
<div class="line"><a name="l00900"></a><span class="lineno">  900</span>&#160;        <span class="keywordtype">int</span> port_near = 0,</div>
<div class="line"><a name="l00901"></a><span class="lineno">  901</span>&#160;        <span class="keywordtype">int</span> port_far = 0</div>
<div class="line"><a name="l00902"></a><span class="lineno">  902</span>&#160;        );</div>
<div class="line"><a name="l00903"></a><span class="lineno">  903</span>&#160; </div>
<div class="line"><a name="l00904"></a><span class="lineno">  904</span>&#160;  <span class="keywordtype">bool</span> GetScreenPort(</div>
<div class="line"><a name="l00905"></a><span class="lineno">  905</span>&#160;        <span class="keywordtype">int</span>* left,</div>
<div class="line"><a name="l00906"></a><span class="lineno">  906</span>&#160;        <span class="keywordtype">int</span>* right,         <span class="comment">//( port_left != port_right )</span></div>
<div class="line"><a name="l00907"></a><span class="lineno">  907</span>&#160;        <span class="keywordtype">int</span>* port_bottom,</div>
<div class="line"><a name="l00908"></a><span class="lineno">  908</span>&#160;        <span class="keywordtype">int</span>* port_top,      <span class="comment">//( port_bottom != port_top)</span></div>
<div class="line"><a name="l00909"></a><span class="lineno">  909</span>&#160;        <span class="keywordtype">int</span>* port_near=NULL,  </div>
<div class="line"><a name="l00910"></a><span class="lineno">  910</span>&#160;        <span class="keywordtype">int</span>* port_far=NULL   </div>
<div class="line"><a name="l00911"></a><span class="lineno">  911</span>&#160;        ) <span class="keyword">const</span>;</div>
<div class="line"><a name="l00912"></a><span class="lineno">  912</span>&#160; </div>
<div class="line"><a name="l00913"></a><span class="lineno">  913</span>&#160;  <span class="comment">/* </span></div>
<div class="line"><a name="l00914"></a><span class="lineno">  914</span>&#160;<span class="comment">  Returns:</span></div>
<div class="line"><a name="l00915"></a><span class="lineno">  915</span>&#160;<span class="comment">    abs(port_right - port_left)</span></div>
<div class="line"><a name="l00916"></a><span class="lineno">  916</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l00917"></a><span class="lineno">  917</span>&#160;  <span class="keywordtype">int</span> ScreenPortWidth() <span class="keyword">const</span>;</div>
<div class="line"><a name="l00918"></a><span class="lineno">  918</span>&#160; </div>
<div class="line"><a name="l00919"></a><span class="lineno">  919</span>&#160;  <span class="comment">/* </span></div>
<div class="line"><a name="l00920"></a><span class="lineno">  920</span>&#160;<span class="comment">  Returns:</span></div>
<div class="line"><a name="l00921"></a><span class="lineno">  921</span>&#160;<span class="comment">    abs(port_bottom - port_top)</span></div>
<div class="line"><a name="l00922"></a><span class="lineno">  922</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l00923"></a><span class="lineno">  923</span>&#160;  <span class="keywordtype">int</span> ScreenPortHeight() <span class="keyword">const</span>;</div>
<div class="line"><a name="l00924"></a><span class="lineno">  924</span>&#160; </div>
<div class="line"><a name="l00925"></a><span class="lineno">  925</span>&#160;  <span class="keywordtype">bool</span> GetScreenPortAspect( <span class="keywordtype">double</span>&amp; ) <span class="keyword">const</span>; <span class="comment">// port&#39;s |width/height|</span></div>
<div class="line"><a name="l00926"></a><span class="lineno">  926</span>&#160; </div>
<div class="line"><a name="l00927"></a><span class="lineno">  927</span>&#160;  <span class="keywordtype">bool</span> GetCameraAngle( </div>
<div class="line"><a name="l00928"></a><span class="lineno">  928</span>&#160;          <span class="keywordtype">double</span>* half_diagonal_angle, <span class="comment">// 1/2 of diagonal subtended angle</span></div>
<div class="line"><a name="l00929"></a><span class="lineno">  929</span>&#160;          <span class="keywordtype">double</span>* half_vertical_angle, <span class="comment">// 1/2 of vertical subtended angle</span></div>
<div class="line"><a name="l00930"></a><span class="lineno">  930</span>&#160;          <span class="keywordtype">double</span>* half_horizontal_angle <span class="comment">// 1/2 of horizontal subtended angle</span></div>
<div class="line"><a name="l00931"></a><span class="lineno">  931</span>&#160;          ) <span class="keyword">const</span>;</div>
<div class="line"><a name="l00932"></a><span class="lineno">  932</span>&#160;  <span class="keywordtype">bool</span> GetCameraAngle( </div>
<div class="line"><a name="l00933"></a><span class="lineno">  933</span>&#160;          <span class="keywordtype">double</span>* half_smallest_angle  <span class="comment">// 1/2 of smallest subtended view angle</span></div>
<div class="line"><a name="l00934"></a><span class="lineno">  934</span>&#160;          ) <span class="keyword">const</span>;</div>
<div class="line"><a name="l00935"></a><span class="lineno">  935</span>&#160;  <span class="keywordtype">bool</span> SetCameraAngle( </div>
<div class="line"><a name="l00936"></a><span class="lineno">  936</span>&#160;          <span class="keywordtype">double</span> half_smallest_angle <span class="comment">// 1/2 of smallest subtended view angle</span></div>
<div class="line"><a name="l00937"></a><span class="lineno">  937</span>&#160;                  <span class="comment">// 0 &lt; angle &lt; pi/2</span></div>
<div class="line"><a name="l00938"></a><span class="lineno">  938</span>&#160;          );</div>
<div class="line"><a name="l00939"></a><span class="lineno">  939</span>&#160; </div>
<div class="line"><a name="l00940"></a><span class="lineno">  940</span>&#160;  <span class="comment">// These functions assume the camera is horizontal and crop the</span></div>
<div class="line"><a name="l00941"></a><span class="lineno">  941</span>&#160;  <span class="comment">// film rather than the image when the aspect of the frustum</span></div>
<div class="line"><a name="l00942"></a><span class="lineno">  942</span>&#160;  <span class="comment">// is not 36/24.  (35mm film is 36mm wide and 24mm high.)</span></div>
<div class="line"><a name="l00943"></a><span class="lineno">  943</span>&#160;  <span class="comment">//</span></div>
<div class="line"><a name="l00944"></a><span class="lineno">  944</span>&#160;  <span class="comment">// The SetCamera35mmLensLength() preserves camera location,</span></div>
<div class="line"><a name="l00945"></a><span class="lineno">  945</span>&#160;  <span class="comment">// changes the frustum, but maintains the frsutrum&#39;s aspect.</span></div>
<div class="line"><a name="l00946"></a><span class="lineno">  946</span>&#160;  <span class="keywordtype">bool</span> GetCamera35mmLensLength( </div>
<div class="line"><a name="l00947"></a><span class="lineno">  947</span>&#160;    <span class="keywordtype">double</span>* lens_length </div>
<div class="line"><a name="l00948"></a><span class="lineno">  948</span>&#160;    ) <span class="keyword">const</span>;</div>
<div class="line"><a name="l00949"></a><span class="lineno">  949</span>&#160;  <span class="keywordtype">bool</span> SetCamera35mmLensLength( </div>
<div class="line"><a name="l00950"></a><span class="lineno">  950</span>&#160;    <span class="keywordtype">double</span> lens_length </div>
<div class="line"><a name="l00951"></a><span class="lineno">  951</span>&#160;    );</div>
<div class="line"><a name="l00952"></a><span class="lineno">  952</span>&#160; </div>
<div class="line"><a name="l00953"></a><span class="lineno">  953</span>&#160;  <span class="comment">// Same as GetCamera35mmLensLength() with &quot;lens&quot; misspelled.</span></div>
<div class="line"><a name="l00954"></a><span class="lineno">  954</span>&#160;  <span class="keywordtype">bool</span> GetCamera35mmLenseLength( </div>
<div class="line"><a name="l00955"></a><span class="lineno">  955</span>&#160;    <span class="keywordtype">double</span>* lens_length </div>
<div class="line"><a name="l00956"></a><span class="lineno">  956</span>&#160;    ) <span class="keyword">const</span>;</div>
<div class="line"><a name="l00957"></a><span class="lineno">  957</span>&#160; </div>
<div class="line"><a name="l00958"></a><span class="lineno">  958</span>&#160;  <span class="comment">// Same as SetCamera35mmLensLength() with &quot;lens&quot; misspelled.</span></div>
<div class="line"><a name="l00959"></a><span class="lineno">  959</span>&#160;  <span class="keywordtype">bool</span> SetCamera35mmLenseLength( </div>
<div class="line"><a name="l00960"></a><span class="lineno">  960</span>&#160;    <span class="keywordtype">double</span> lens_length </div>
<div class="line"><a name="l00961"></a><span class="lineno">  961</span>&#160;    );</div>
<div class="line"><a name="l00962"></a><span class="lineno">  962</span>&#160; </div>
<div class="line"><a name="l00963"></a><span class="lineno">  963</span>&#160;  <span class="keywordtype">bool</span> GetXform( </div>
<div class="line"><a name="l00964"></a><span class="lineno">  964</span>&#160;         ON::coordinate_system srcCS,</div>
<div class="line"><a name="l00965"></a><span class="lineno">  965</span>&#160;         ON::coordinate_system destCS,</div>
<div class="line"><a name="l00966"></a><span class="lineno">  966</span>&#160;         <a class="code" href="class_o_n___xform.html">ON_Xform</a>&amp; matrix      <span class="comment">// 4x4 transformation matrix (acts on the left)</span></div>
<div class="line"><a name="l00967"></a><span class="lineno">  967</span>&#160;         ) <span class="keyword">const</span>;</div>
<div class="line"><a name="l00968"></a><span class="lineno">  968</span>&#160; </div>
<div class="line"><a name="l00969"></a><span class="lineno">  969</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l00970"></a><span class="lineno">  970</span>&#160;<span class="comment">  Description:</span></div>
<div class="line"><a name="l00971"></a><span class="lineno">  971</span>&#160;<span class="comment">    Get the world coordinate line in the view frustum</span></div>
<div class="line"><a name="l00972"></a><span class="lineno">  972</span>&#160;<span class="comment">    that projects to a point on the screen.</span></div>
<div class="line"><a name="l00973"></a><span class="lineno">  973</span>&#160;<span class="comment">  Parameters:</span></div>
<div class="line"><a name="l00974"></a><span class="lineno">  974</span>&#160;<span class="comment">    screenx - [in]</span></div>
<div class="line"><a name="l00975"></a><span class="lineno">  975</span>&#160;<span class="comment">    screeny - [in] (screenx,screeny) = screen location</span></div>
<div class="line"><a name="l00976"></a><span class="lineno">  976</span>&#160;<span class="comment">    world_line - [out] 3d world coordinate line segment</span></div>
<div class="line"><a name="l00977"></a><span class="lineno">  977</span>&#160;<span class="comment">           starting on the near clipping plane and ending </span></div>
<div class="line"><a name="l00978"></a><span class="lineno">  978</span>&#160;<span class="comment">           on the far clipping plane.</span></div>
<div class="line"><a name="l00979"></a><span class="lineno">  979</span>&#160;<span class="comment">  Returns:</span></div>
<div class="line"><a name="l00980"></a><span class="lineno">  980</span>&#160;<span class="comment">    true if successful. </span></div>
<div class="line"><a name="l00981"></a><span class="lineno">  981</span>&#160;<span class="comment">    false if view projection or frustum is invalid.</span></div>
<div class="line"><a name="l00982"></a><span class="lineno">  982</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l00983"></a><span class="lineno">  983</span>&#160;  <span class="keywordtype">bool</span> GetFrustumLine( </div>
<div class="line"><a name="l00984"></a><span class="lineno">  984</span>&#160;            <span class="keywordtype">double</span> screenx, </div>
<div class="line"><a name="l00985"></a><span class="lineno">  985</span>&#160;            <span class="keywordtype">double</span> screeny, </div>
<div class="line"><a name="l00986"></a><span class="lineno">  986</span>&#160;            <a class="code" href="class_o_n___line.html">ON_Line</a>&amp; world_line</div>
<div class="line"><a name="l00987"></a><span class="lineno">  987</span>&#160;            ) <span class="keyword">const</span>;</div>
<div class="line"><a name="l00988"></a><span class="lineno">  988</span>&#160; </div>
<div class="line"><a name="l00989"></a><span class="lineno">  989</span>&#160;  <span class="comment">// display tools</span></div>
<div class="line"><a name="l00990"></a><span class="lineno">  990</span>&#160;  <span class="keywordtype">bool</span> GetWorldToScreenScale( </div>
<div class="line"><a name="l00991"></a><span class="lineno">  991</span>&#160;    <span class="keyword">const</span> <a class="code" href="class_o_n__3d_point.html">ON_3dPoint</a>&amp; point_in_frustum, <span class="comment">// [in]  point in viewing frustum.</span></div>
<div class="line"><a name="l00992"></a><span class="lineno">  992</span>&#160;    <span class="keywordtype">double</span>* pixels_per_unit             <span class="comment">// [out] scale = number of pixels per world unit at the 3d point</span></div>
<div class="line"><a name="l00993"></a><span class="lineno">  993</span>&#160;    ) <span class="keyword">const</span>;</div>
<div class="line"><a name="l00994"></a><span class="lineno">  994</span>&#160; </div>
<div class="line"><a name="l00995"></a><span class="lineno">  995</span>&#160;  <span class="keywordtype">bool</span> GetCoordinateSprite(</div>
<div class="line"><a name="l00996"></a><span class="lineno">  996</span>&#160;         <span class="keywordtype">int</span>,        <span class="comment">// size in pixels of coordinate sprite axes</span></div>
<div class="line"><a name="l00997"></a><span class="lineno">  997</span>&#160;         <span class="keywordtype">int</span>, <span class="keywordtype">int</span>,   <span class="comment">// screen (x,y) for sprite origin</span></div>
<div class="line"><a name="l00998"></a><span class="lineno">  998</span>&#160;         <span class="keywordtype">int</span>[3],     <span class="comment">// returns depth order for axes</span></div>
<div class="line"><a name="l00999"></a><span class="lineno">  999</span>&#160;         <span class="keywordtype">double</span> [3][2]  <span class="comment">// screen coords for axes ends</span></div>
<div class="line"><a name="l01000"></a><span class="lineno"> 1000</span>&#160;         ) <span class="keyword">const</span>;</div>
<div class="line"><a name="l01001"></a><span class="lineno"> 1001</span>&#160; </div>
<div class="line"><a name="l01002"></a><span class="lineno"> 1002</span>&#160;  <span class="comment">// Use Extents() as a quick way to set a viewport to so that bounding</span></div>
<div class="line"><a name="l01003"></a><span class="lineno"> 1003</span>&#160;  <span class="comment">// volume is inside of a viewports frusmtrum.</span></div>
<div class="line"><a name="l01004"></a><span class="lineno"> 1004</span>&#160;  <span class="comment">// The view angle is used to determine the position of the camera.</span></div>
<div class="line"><a name="l01005"></a><span class="lineno"> 1005</span>&#160;  <span class="keywordtype">bool</span> Extents( </div>
<div class="line"><a name="l01006"></a><span class="lineno"> 1006</span>&#160;         <span class="keywordtype">double</span> half_view_angle,        <span class="comment">// 1/2 smallest subtended view angle</span></div>
<div class="line"><a name="l01007"></a><span class="lineno"> 1007</span>&#160;                        <span class="comment">// (0 &lt; angle &lt; pi/2)</span></div>
<div class="line"><a name="l01008"></a><span class="lineno"> 1008</span>&#160;         <span class="keyword">const</span> <a class="code" href="class_o_n___bounding_box.html">ON_BoundingBox</a>&amp; world_bbox<span class="comment">// 3d world coordinate bounding box</span></div>
<div class="line"><a name="l01009"></a><span class="lineno"> 1009</span>&#160;         );</div>
<div class="line"><a name="l01010"></a><span class="lineno"> 1010</span>&#160;  <span class="keywordtype">bool</span> Extents( </div>
<div class="line"><a name="l01011"></a><span class="lineno"> 1011</span>&#160;         <span class="keywordtype">double</span> half_view_angle,        <span class="comment">// 1/2 smallest subtended view angle</span></div>
<div class="line"><a name="l01012"></a><span class="lineno"> 1012</span>&#160;                        <span class="comment">// (0 &lt; angle &lt; pi/2)</span></div>
<div class="line"><a name="l01013"></a><span class="lineno"> 1013</span>&#160;         <span class="keyword">const</span> <a class="code" href="class_o_n__3d_point.html">ON_3dPoint</a>&amp; center, <span class="comment">// 3d world coordinate bounding sphere center</span></div>
<div class="line"><a name="l01014"></a><span class="lineno"> 1014</span>&#160;         <span class="keywordtype">double</span> radius        <span class="comment">// 3d sphere radius</span></div>
<div class="line"><a name="l01015"></a><span class="lineno"> 1015</span>&#160;         );</div>
<div class="line"><a name="l01016"></a><span class="lineno"> 1016</span>&#160; </div>
<div class="line"><a name="l01018"></a><span class="lineno"> 1018</span>&#160;  <span class="comment">// View changing from screen input points.  Handy for</span></div>
<div class="line"><a name="l01019"></a><span class="lineno"> 1019</span>&#160;  <span class="comment">// using a mouse to manipulate a view.</span></div>
<div class="line"><a name="l01020"></a><span class="lineno"> 1020</span>&#160;  <span class="comment">//</span></div>
<div class="line"><a name="l01021"></a><span class="lineno"> 1021</span>&#160; </div>
<div class="line"><a name="l01023"></a><span class="lineno"> 1023</span>&#160;  <span class="comment">// ZoomToScreenRect() may change camera and frustum settings</span></div>
<div class="line"><a name="l01024"></a><span class="lineno"> 1024</span>&#160;  <span class="keywordtype">bool</span> ZoomToScreenRect(</div>
<div class="line"><a name="l01025"></a><span class="lineno"> 1025</span>&#160;         <span class="keywordtype">int</span> screen_x0, </div>
<div class="line"><a name="l01026"></a><span class="lineno"> 1026</span>&#160;         <span class="keywordtype">int</span> screen_y0,  <span class="comment">// (x,y) screen coords of a rectangle corner</span></div>
<div class="line"><a name="l01027"></a><span class="lineno"> 1027</span>&#160;         <span class="keywordtype">int</span> screen_x1, </div>
<div class="line"><a name="l01028"></a><span class="lineno"> 1028</span>&#160;         <span class="keywordtype">int</span> screen_y1   <span class="comment">// (x,y) screen coords of opposite rectangle corner</span></div>
<div class="line"><a name="l01029"></a><span class="lineno"> 1029</span>&#160;         );</div>
<div class="line"><a name="l01030"></a><span class="lineno"> 1030</span>&#160; </div>
<div class="line"><a name="l01032"></a><span class="lineno"> 1032</span>&#160;  <span class="comment">// DollyCamera() does not update the frustum&#39;s clipping planes.</span></div>
<div class="line"><a name="l01033"></a><span class="lineno"> 1033</span>&#160;  <span class="comment">// To update the frustum&#39;s clipping planes call DollyFrustum(d)</span></div>
<div class="line"><a name="l01034"></a><span class="lineno"> 1034</span>&#160;  <span class="comment">// with d = dollyVector o cameraFrameZ.  To convert screen locations</span></div>
<div class="line"><a name="l01035"></a><span class="lineno"> 1035</span>&#160;  <span class="comment">// into a dolly vector, use GetDollyCameraVector().</span></div>
<div class="line"><a name="l01036"></a><span class="lineno"> 1036</span>&#160;  <span class="keywordtype">bool</span> DollyCamera( <span class="comment">// Does not update frustum.  To update frustum use </span></div>
<div class="line"><a name="l01037"></a><span class="lineno"> 1037</span>&#160;                    <span class="comment">// DollyFrustum(d) with d = dollyVector o cameraFrameZ</span></div>
<div class="line"><a name="l01038"></a><span class="lineno"> 1038</span>&#160;          <span class="keyword">const</span> <a class="code" href="class_o_n__3d_vector.html">ON_3dVector</a>&amp; dolly_vector <span class="comment">// dolly vector in world coordinates</span></div>
<div class="line"><a name="l01039"></a><span class="lineno"> 1039</span>&#160;          );</div>
<div class="line"><a name="l01040"></a><span class="lineno"> 1040</span>&#160; </div>
<div class="line"><a name="l01042"></a><span class="lineno"> 1042</span>&#160;  <span class="comment">// Gets a world coordinate dolly vector that can be passed to</span></div>
<div class="line"><a name="l01043"></a><span class="lineno"> 1043</span>&#160;  <span class="comment">// DollyCamera().</span></div>
<div class="line"><a name="l01044"></a><span class="lineno"> 1044</span>&#160;  <span class="keywordtype">bool</span> GetDollyCameraVector(</div>
<div class="line"><a name="l01045"></a><span class="lineno"> 1045</span>&#160;         <span class="keywordtype">int</span> screen_x0, </div>
<div class="line"><a name="l01046"></a><span class="lineno"> 1046</span>&#160;         <span class="keywordtype">int</span> screen_y0,  <span class="comment">// (x,y) screen coords of start point</span></div>
<div class="line"><a name="l01047"></a><span class="lineno"> 1047</span>&#160;         <span class="keywordtype">int</span> screen_x1, </div>
<div class="line"><a name="l01048"></a><span class="lineno"> 1048</span>&#160;         <span class="keywordtype">int</span> screen_y1,  <span class="comment">// (x,y) screen coords of end point</span></div>
<div class="line"><a name="l01049"></a><span class="lineno"> 1049</span>&#160;         <span class="keywordtype">double</span> proj_plane_dist,      <span class="comment">// distance of projection plane from camera.</span></div>
<div class="line"><a name="l01050"></a><span class="lineno"> 1050</span>&#160;                      <span class="comment">// When in doubt, use 0.5*(frus_near+frus_far).</span></div>
<div class="line"><a name="l01051"></a><span class="lineno"> 1051</span>&#160;         <a class="code" href="class_o_n__3d_vector.html">ON_3dVector</a>&amp; dolly_vector <span class="comment">// world coordinate dolly vector returned here</span></div>
<div class="line"><a name="l01052"></a><span class="lineno"> 1052</span>&#160;         ) <span class="keyword">const</span>;</div>
<div class="line"><a name="l01053"></a><span class="lineno"> 1053</span>&#160; </div>
<div class="line"><a name="l01055"></a><span class="lineno"> 1055</span>&#160;  <span class="comment">// Moves frustum&#39;s clipping planes</span></div>
<div class="line"><a name="l01056"></a><span class="lineno"> 1056</span>&#160;  <span class="keywordtype">bool</span> DollyFrustum(</div>
<div class="line"><a name="l01057"></a><span class="lineno"> 1057</span>&#160;          <span class="keywordtype">double</span> dolly_distance <span class="comment">// distance to move in camera direction</span></div>
<div class="line"><a name="l01058"></a><span class="lineno"> 1058</span>&#160;          );</div>
<div class="line"><a name="l01059"></a><span class="lineno"> 1059</span>&#160; </div>
<div class="line"><a name="l01060"></a><span class="lineno"> 1060</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l01061"></a><span class="lineno"> 1061</span>&#160;<span class="comment">  Description:</span></div>
<div class="line"><a name="l01062"></a><span class="lineno"> 1062</span>&#160;<span class="comment">    Apply scaling factors to parallel projection clipping coordinates</span></div>
<div class="line"><a name="l01063"></a><span class="lineno"> 1063</span>&#160;<span class="comment">    by setting the m_clip_mod transformation.  </span></div>
<div class="line"><a name="l01064"></a><span class="lineno"> 1064</span>&#160;<span class="comment">  Parameters:</span></div>
<div class="line"><a name="l01065"></a><span class="lineno"> 1065</span>&#160;<span class="comment">    x - [in] x &gt; 0</span></div>
<div class="line"><a name="l01066"></a><span class="lineno"> 1066</span>&#160;<span class="comment">    y - [in] y &gt; 0</span></div>
<div class="line"><a name="l01067"></a><span class="lineno"> 1067</span>&#160;<span class="comment">  Example:</span></div>
<div class="line"><a name="l01068"></a><span class="lineno"> 1068</span>&#160;<span class="comment">    If you want to compress the view projection across the viewing</span></div>
<div class="line"><a name="l01069"></a><span class="lineno"> 1069</span>&#160;<span class="comment">    plane, then set x = 0.5, y = 1.0, and z = 1.0.</span></div>
<div class="line"><a name="l01070"></a><span class="lineno"> 1070</span>&#160;<span class="comment">  Returns:</span></div>
<div class="line"><a name="l01071"></a><span class="lineno"> 1071</span>&#160;<span class="comment">    True if successful.</span></div>
<div class="line"><a name="l01072"></a><span class="lineno"> 1072</span>&#160;<span class="comment">    False if input is invalid or the view is a perspective view.</span></div>
<div class="line"><a name="l01073"></a><span class="lineno"> 1073</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l01074"></a><span class="lineno"> 1074</span>&#160;  <span class="keywordtype">bool</span> SetViewScale( <span class="keywordtype">double</span> x, <span class="keywordtype">double</span> y );</div>
<div class="line"><a name="l01075"></a><span class="lineno"> 1075</span>&#160;  <span class="keywordtype">void</span> GetViewScale( <span class="keywordtype">double</span>* x, <span class="keywordtype">double</span>* y ) <span class="keyword">const</span>;</div>
<div class="line"><a name="l01076"></a><span class="lineno"> 1076</span>&#160; </div>
<div class="line"><a name="l01077"></a><span class="lineno"> 1077</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l01078"></a><span class="lineno"> 1078</span>&#160;<span class="comment">  Description:</span></div>
<div class="line"><a name="l01079"></a><span class="lineno"> 1079</span>&#160;<span class="comment">    Gets the m_clip_mod transformation;</span></div>
<div class="line"><a name="l01080"></a><span class="lineno"> 1080</span>&#160;<span class="comment">  Returns:</span></div>
<div class="line"><a name="l01081"></a><span class="lineno"> 1081</span>&#160;<span class="comment">    value of the m_clip_mod transformation.</span></div>
<div class="line"><a name="l01082"></a><span class="lineno"> 1082</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l01083"></a><span class="lineno"> 1083</span>&#160;  <a class="code" href="class_o_n___xform.html">ON_Xform</a> ClipModXform() <span class="keyword">const</span>;</div>
<div class="line"><a name="l01084"></a><span class="lineno"> 1084</span>&#160; </div>
<div class="line"><a name="l01085"></a><span class="lineno"> 1085</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l01086"></a><span class="lineno"> 1086</span>&#160;<span class="comment">  Description:</span></div>
<div class="line"><a name="l01087"></a><span class="lineno"> 1087</span>&#160;<span class="comment">    Gets the m_clip_mod_inverse transformation;</span></div>
<div class="line"><a name="l01088"></a><span class="lineno"> 1088</span>&#160;<span class="comment">  Returns:</span></div>
<div class="line"><a name="l01089"></a><span class="lineno"> 1089</span>&#160;<span class="comment">    value of the m_clip_mod_inverse transformation.</span></div>
<div class="line"><a name="l01090"></a><span class="lineno"> 1090</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l01091"></a><span class="lineno"> 1091</span>&#160;  <a class="code" href="class_o_n___xform.html">ON_Xform</a> ClipModInverseXform() <span class="keyword">const</span>;</div>
<div class="line"><a name="l01092"></a><span class="lineno"> 1092</span>&#160; </div>
<div class="line"><a name="l01093"></a><span class="lineno"> 1093</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l01094"></a><span class="lineno"> 1094</span>&#160;<span class="comment">  Returns:</span></div>
<div class="line"><a name="l01095"></a><span class="lineno"> 1095</span>&#160;<span class="comment">    True if clip mod xform is identity.</span></div>
<div class="line"><a name="l01096"></a><span class="lineno"> 1096</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l01097"></a><span class="lineno"> 1097</span>&#160;  <span class="keywordtype">bool</span> ClipModXformIsIdentity() <span class="keyword">const</span>;</div>
<div class="line"><a name="l01098"></a><span class="lineno"> 1098</span>&#160; </div>
<div class="line"><a name="l01099"></a><span class="lineno"> 1099</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l01100"></a><span class="lineno"> 1100</span>&#160;<span class="comment">  Description:</span></div>
<div class="line"><a name="l01101"></a><span class="lineno"> 1101</span>&#160;<span class="comment">    Return a point on the central axis of the view frustum.</span></div>
<div class="line"><a name="l01102"></a><span class="lineno"> 1102</span>&#160;<span class="comment">    This point is a good choice for a general purpose target point.</span></div>
<div class="line"><a name="l01103"></a><span class="lineno"> 1103</span>&#160;<span class="comment">  Parameters:</span></div>
<div class="line"><a name="l01104"></a><span class="lineno"> 1104</span>&#160;<span class="comment">    target_distance - [in]</span></div>
<div class="line"><a name="l01105"></a><span class="lineno"> 1105</span>&#160;<span class="comment">      If target_distance &gt; 0.0, then the distance from the returned</span></div>
<div class="line"><a name="l01106"></a><span class="lineno"> 1106</span>&#160;<span class="comment">      point to the camera plane will be target_distance. Note that</span></div>
<div class="line"><a name="l01107"></a><span class="lineno"> 1107</span>&#160;<span class="comment">      if the frustum is not symmetric, the distance from the</span></div>
<div class="line"><a name="l01108"></a><span class="lineno"> 1108</span>&#160;<span class="comment">      returned point to the camera location will be larger than</span></div>
<div class="line"><a name="l01109"></a><span class="lineno"> 1109</span>&#160;<span class="comment">      target_distanct.</span></div>
<div class="line"><a name="l01110"></a><span class="lineno"> 1110</span>&#160;<span class="comment">      If target_distance == ON_UNSET_VALUE and the frustum</span></div>
<div class="line"><a name="l01111"></a><span class="lineno"> 1111</span>&#160;<span class="comment">      is valid with near &gt; 0.0, then 0.5*(near + far) will be used</span></div>
<div class="line"><a name="l01112"></a><span class="lineno"> 1112</span>&#160;<span class="comment">      as the target_distance.</span></div>
<div class="line"><a name="l01113"></a><span class="lineno"> 1113</span>&#160;<span class="comment">  Returns:</span></div>
<div class="line"><a name="l01114"></a><span class="lineno"> 1114</span>&#160;<span class="comment">    A point on the frustum&#39;s central axis.  If the viewport or input</span></div>
<div class="line"><a name="l01115"></a><span class="lineno"> 1115</span>&#160;<span class="comment">    is not valid, then ON_3dPoint::UnsetPoint is returned.</span></div>
<div class="line"><a name="l01116"></a><span class="lineno"> 1116</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l01117"></a><span class="lineno"> 1117</span>&#160;  <a class="code" href="class_o_n__3d_point.html">ON_3dPoint</a> FrustumCenterPoint( <span class="keywordtype">double</span> target_distance ) <span class="keyword">const</span>;</div>
<div class="line"><a name="l01118"></a><span class="lineno"> 1118</span>&#160; </div>
<div class="line"><a name="l01119"></a><span class="lineno"> 1119</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l01120"></a><span class="lineno"> 1120</span>&#160;<span class="comment">  Returns:</span></div>
<div class="line"><a name="l01121"></a><span class="lineno"> 1121</span>&#160;<span class="comment">    The current value of the target point.  This point does not play</span></div>
<div class="line"><a name="l01122"></a><span class="lineno"> 1122</span>&#160;<span class="comment">    a role in the view projection calculations.  It can be used as a </span></div>
<div class="line"><a name="l01123"></a><span class="lineno"> 1123</span>&#160;<span class="comment">    fixed point when changing the camera so the visible regions of the</span></div>
<div class="line"><a name="l01124"></a><span class="lineno"> 1124</span>&#160;<span class="comment">    before and after frustums both contain the region of interest.</span></div>
<div class="line"><a name="l01125"></a><span class="lineno"> 1125</span>&#160;<span class="comment">  Remarks:</span></div>
<div class="line"><a name="l01126"></a><span class="lineno"> 1126</span>&#160;<span class="comment">    The default constructor sets this point on ON_3dPoint::UnsetPoint.</span></div>
<div class="line"><a name="l01127"></a><span class="lineno"> 1127</span>&#160;<span class="comment">    You must explicitly call one SetTargetPoint() functions to set</span></div>
<div class="line"><a name="l01128"></a><span class="lineno"> 1128</span>&#160;<span class="comment">    the target point.</span></div>
<div class="line"><a name="l01129"></a><span class="lineno"> 1129</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l01130"></a><span class="lineno"> 1130</span>&#160;  <a class="code" href="class_o_n__3d_point.html">ON_3dPoint</a> TargetPoint() <span class="keyword">const</span>;</div>
<div class="line"><a name="l01131"></a><span class="lineno"> 1131</span>&#160; </div>
<div class="line"><a name="l01132"></a><span class="lineno"> 1132</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l01133"></a><span class="lineno"> 1133</span>&#160;<span class="comment">  Description:</span></div>
<div class="line"><a name="l01134"></a><span class="lineno"> 1134</span>&#160;<span class="comment">    Set the target point.</span></div>
<div class="line"><a name="l01135"></a><span class="lineno"> 1135</span>&#160;<span class="comment">  Parameters:</span></div>
<div class="line"><a name="l01136"></a><span class="lineno"> 1136</span>&#160;<span class="comment">    target_point - [in]</span></div>
<div class="line"><a name="l01137"></a><span class="lineno"> 1137</span>&#160;<span class="comment">      When in doubt, the point returned by FrustumCenterPoint(ON_UNSET_VALUE)</span></div>
<div class="line"><a name="l01138"></a><span class="lineno"> 1138</span>&#160;<span class="comment">      is a good choice.</span></div>
<div class="line"><a name="l01139"></a><span class="lineno"> 1139</span>&#160;<span class="comment">  Remarks:</span></div>
<div class="line"><a name="l01140"></a><span class="lineno"> 1140</span>&#160;<span class="comment">    The default constructor sets this point on ON_3dPoint::UnsetPoint.</span></div>
<div class="line"><a name="l01141"></a><span class="lineno"> 1141</span>&#160;<span class="comment">    You must explicitly call one SetTargetPoint() functions to set</span></div>
<div class="line"><a name="l01142"></a><span class="lineno"> 1142</span>&#160;<span class="comment">    the target point.</span></div>
<div class="line"><a name="l01143"></a><span class="lineno"> 1143</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l01144"></a><span class="lineno"> 1144</span>&#160;  <span class="keywordtype">bool</span> SetTargetPoint( <a class="code" href="class_o_n__3d_point.html">ON_3dPoint</a> target_point );</div>
<div class="line"><a name="l01145"></a><span class="lineno"> 1145</span>&#160; </div>
<div class="line"><a name="l01146"></a><span class="lineno"> 1146</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l01147"></a><span class="lineno"> 1147</span>&#160;<span class="comment">  Description:</span></div>
<div class="line"><a name="l01148"></a><span class="lineno"> 1148</span>&#160;<span class="comment">    Get the distance from the target point to the camera plane.</span></div>
<div class="line"><a name="l01149"></a><span class="lineno"> 1149</span>&#160;<span class="comment">    Note that if the frustum is not symmetric, then this distance</span></div>
<div class="line"><a name="l01150"></a><span class="lineno"> 1150</span>&#160;<span class="comment">    is shorter than the distance from the target to the camera location.</span></div>
<div class="line"><a name="l01151"></a><span class="lineno"> 1151</span>&#160;<span class="comment">  Parameters:</span></div>
<div class="line"><a name="l01152"></a><span class="lineno"> 1152</span>&#160;<span class="comment">    bUseFrustumCenterFallback - [in]</span></div>
<div class="line"><a name="l01153"></a><span class="lineno"> 1153</span>&#160;<span class="comment">      If bUseFrustumCenterFallback is false and the target point is</span></div>
<div class="line"><a name="l01154"></a><span class="lineno"> 1154</span>&#160;<span class="comment">      not valid, then ON_UNSET_VALUE is returned.</span></div>
<div class="line"><a name="l01155"></a><span class="lineno"> 1155</span>&#160;<span class="comment">      If bUseFrustumCenterFallback is true and the frustum is valid</span></div>
<div class="line"><a name="l01156"></a><span class="lineno"> 1156</span>&#160;<span class="comment">      and current target point is not valid or is behind the camera,</span></div>
<div class="line"><a name="l01157"></a><span class="lineno"> 1157</span>&#160;<span class="comment">      then 0.5*(near + far) is returned.</span></div>
<div class="line"><a name="l01158"></a><span class="lineno"> 1158</span>&#160;<span class="comment">  Returns:</span></div>
<div class="line"><a name="l01159"></a><span class="lineno"> 1159</span>&#160;<span class="comment">    Shortest signed distance from camera plane to target point.</span></div>
<div class="line"><a name="l01160"></a><span class="lineno"> 1160</span>&#160;<span class="comment">    If the target point is on the visible side of the camera,</span></div>
<div class="line"><a name="l01161"></a><span class="lineno"> 1161</span>&#160;<span class="comment">    a positive value is returned.  ON_UNSET_VALUE is returned</span></div>
<div class="line"><a name="l01162"></a><span class="lineno"> 1162</span>&#160;<span class="comment">    when the input of view is not valid.</span></div>
<div class="line"><a name="l01163"></a><span class="lineno"> 1163</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l01164"></a><span class="lineno"> 1164</span>&#160;  <span class="keywordtype">double</span> TargetDistance( <span class="keywordtype">bool</span> bUseFrustumCenterFallback ) <span class="keyword">const</span>;</div>
<div class="line"><a name="l01165"></a><span class="lineno"> 1165</span>&#160; </div>
<div class="line"><a name="l01166"></a><span class="lineno"> 1166</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l01167"></a><span class="lineno"> 1167</span>&#160;<span class="comment">  Description:    </span></div>
<div class="line"><a name="l01168"></a><span class="lineno"> 1168</span>&#160;<span class="comment">    Get suggested values for setting the perspective minimum</span></div>
<div class="line"><a name="l01169"></a><span class="lineno"> 1169</span>&#160;<span class="comment">    near distance and minimum near/far ratio.</span></div>
<div class="line"><a name="l01170"></a><span class="lineno"> 1170</span>&#160;<span class="comment">  Parameters:      </span></div>
<div class="line"><a name="l01171"></a><span class="lineno"> 1171</span>&#160;<span class="comment">    camera_location - [in]</span></div>
<div class="line"><a name="l01172"></a><span class="lineno"> 1172</span>&#160;<span class="comment">    depth_buffer_bit_depth - [in]</span></div>
<div class="line"><a name="l01173"></a><span class="lineno"> 1173</span>&#160;<span class="comment">      typically 32, 24, 16 or 8, but any positive value can be </span></div>
<div class="line"><a name="l01174"></a><span class="lineno"> 1174</span>&#160;<span class="comment">      passed in.</span></div>
<div class="line"><a name="l01175"></a><span class="lineno"> 1175</span>&#160;<span class="comment">    min_near_dist - [out]</span></div>
<div class="line"><a name="l01176"></a><span class="lineno"> 1176</span>&#160;<span class="comment">      Suggest value for passing to SetPerspectiveMinNearDist().     </span></div>
<div class="line"><a name="l01177"></a><span class="lineno"> 1177</span>&#160;<span class="comment">    min_near_over_far - [out]</span></div>
<div class="line"><a name="l01178"></a><span class="lineno"> 1178</span>&#160;<span class="comment">      Suggest value for passing to SetPerspectiveMinNearOverFar().     </span></div>
<div class="line"><a name="l01179"></a><span class="lineno"> 1179</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l01180"></a><span class="lineno"> 1180</span>&#160;  <span class="keyword">static</span> <span class="keywordtype">void</span> GetPerspectiveClippingPlaneConstraints( </div>
<div class="line"><a name="l01181"></a><span class="lineno"> 1181</span>&#160;        <a class="code" href="class_o_n__3d_point.html">ON_3dPoint</a> camera_location,</div>
<div class="line"><a name="l01182"></a><span class="lineno"> 1182</span>&#160;        <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> depth_buffer_bit_depth,</div>
<div class="line"><a name="l01183"></a><span class="lineno"> 1183</span>&#160;        <span class="keywordtype">double</span>* min_near_dist,</div>
<div class="line"><a name="l01184"></a><span class="lineno"> 1184</span>&#160;        <span class="keywordtype">double</span>* min_near_over_far</div>
<div class="line"><a name="l01185"></a><span class="lineno"> 1185</span>&#160;        );</div>
<div class="line"><a name="l01186"></a><span class="lineno"> 1186</span>&#160; </div>
<div class="line"><a name="l01187"></a><span class="lineno"> 1187</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l01188"></a><span class="lineno"> 1188</span>&#160;<span class="comment">  Description:</span></div>
<div class="line"><a name="l01189"></a><span class="lineno"> 1189</span>&#160;<span class="comment">    Calculate the value to add to homogeneous &quot;z&quot; clipping coordinate</span></div>
<div class="line"><a name="l01190"></a><span class="lineno"> 1190</span>&#160;<span class="comment">    that corresponds to moving the corresponding euclidean camera</span></div>
<div class="line"><a name="l01191"></a><span class="lineno"> 1191</span>&#160;<span class="comment">    coordinate by relative_depth_bias*(far - near).</span></div>
<div class="line"><a name="l01192"></a><span class="lineno"> 1192</span>&#160;<span class="comment">  Parameters:</span></div>
<div class="line"><a name="l01193"></a><span class="lineno"> 1193</span>&#160;<span class="comment">    relative_depth_bias - [in]</span></div>
<div class="line"><a name="l01194"></a><span class="lineno"> 1194</span>&#160;<span class="comment">      signed relative bias. </span></div>
<div class="line"><a name="l01195"></a><span class="lineno"> 1195</span>&#160;<span class="comment">      = 0: no bias, </span></div>
<div class="line"><a name="l01196"></a><span class="lineno"> 1196</span>&#160;<span class="comment">      &gt; 0: bias towards frustum&#39;s near clipping plane</span></div>
<div class="line"><a name="l01197"></a><span class="lineno"> 1197</span>&#160;<span class="comment">      &lt; 0: bias towards frustum&#39;s far clipping plane</span></div>
<div class="line"><a name="l01198"></a><span class="lineno"> 1198</span>&#160;<span class="comment">      When you have curves and points that are &quot;on&quot; shaded objects,</span></div>
<div class="line"><a name="l01199"></a><span class="lineno"> 1199</span>&#160;<span class="comment">      values around 1/256 work well to move the wire objects</span></div>
<div class="line"><a name="l01200"></a><span class="lineno"> 1200</span>&#160;<span class="comment">      in front of or behind shaded objects.</span></div>
<div class="line"><a name="l01201"></a><span class="lineno"> 1201</span>&#160;<span class="comment">    clip_z [-in]</span></div>
<div class="line"><a name="l01202"></a><span class="lineno"> 1202</span>&#160;<span class="comment">    clip_w [-in]</span></div>
<div class="line"><a name="l01203"></a><span class="lineno"> 1203</span>&#160;<span class="comment">      clip_z and clip_w are the homogeneous &quot;w&quot; and &quot;w&quot; coordinates</span></div>
<div class="line"><a name="l01204"></a><span class="lineno"> 1204</span>&#160;<span class="comment">      of a homogeneous clipping coordinate point.</span></div>
<div class="line"><a name="l01205"></a><span class="lineno"> 1205</span>&#160;<span class="comment">  Returns:</span></div>
<div class="line"><a name="l01206"></a><span class="lineno"> 1206</span>&#160;<span class="comment">    The clipping coordinate depth bias to add to the z-clipping</span></div>
<div class="line"><a name="l01207"></a><span class="lineno"> 1207</span>&#160;<span class="comment">    coordinate that corresponds to adding cam_depth_bias</span></div>
<div class="line"><a name="l01208"></a><span class="lineno"> 1208</span>&#160;<span class="comment">    to the z camera coordinate.</span></div>
<div class="line"><a name="l01209"></a><span class="lineno"> 1209</span>&#160;<span class="comment">  Remarks:</span></div>
<div class="line"><a name="l01210"></a><span class="lineno"> 1210</span>&#160;<span class="comment">    For perspective views, this bias is largest in the vicinity</span></div>
<div class="line"><a name="l01211"></a><span class="lineno"> 1211</span>&#160;<span class="comment">    of the frustum&#39;s near clipping plane and smallest in the</span></div>
<div class="line"><a name="l01212"></a><span class="lineno"> 1212</span>&#160;<span class="comment">    vicinity of the frustum&#39;s far clipping plane.</span></div>
<div class="line"><a name="l01213"></a><span class="lineno"> 1213</span>&#160;<span class="comment">    For orthographic projectsions, this bias is constant.</span></div>
<div class="line"><a name="l01214"></a><span class="lineno"> 1214</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l01215"></a><span class="lineno"> 1215</span>&#160;  <span class="keywordtype">double</span> ClipCoordDepthBias(</div>
<div class="line"><a name="l01216"></a><span class="lineno"> 1216</span>&#160;    <span class="keywordtype">double</span> relative_depth_bias,</div>
<div class="line"><a name="l01217"></a><span class="lineno"> 1217</span>&#160;    <span class="keywordtype">double</span> clip_z, </div>
<div class="line"><a name="l01218"></a><span class="lineno"> 1218</span>&#160;    <span class="keywordtype">double</span> clip_w</div>
<div class="line"><a name="l01219"></a><span class="lineno"> 1219</span>&#160;    ) <span class="keyword">const</span>;</div>
<div class="line"><a name="l01220"></a><span class="lineno"> 1220</span>&#160; </div>
<div class="line"><a name="l01221"></a><span class="lineno"> 1221</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l01222"></a><span class="lineno"> 1222</span>&#160;<span class="comment">  Description:</span></div>
<div class="line"><a name="l01223"></a><span class="lineno"> 1223</span>&#160;<span class="comment">    Calculate a transformation to apply to clipping coordinates to</span></div>
<div class="line"><a name="l01224"></a><span class="lineno"> 1224</span>&#160;<span class="comment">    bias their depth.</span></div>
<div class="line"><a name="l01225"></a><span class="lineno"> 1225</span>&#160;<span class="comment"></span> </div>
<div class="line"><a name="l01226"></a><span class="lineno"> 1226</span>&#160;<span class="comment">  Parameters:</span></div>
<div class="line"><a name="l01227"></a><span class="lineno"> 1227</span>&#160;<span class="comment">    relative_depth_bias - [in]</span></div>
<div class="line"><a name="l01228"></a><span class="lineno"> 1228</span>&#160;<span class="comment">      signed relative bias. </span></div>
<div class="line"><a name="l01229"></a><span class="lineno"> 1229</span>&#160;<span class="comment">      = 0: no bias, </span></div>
<div class="line"><a name="l01230"></a><span class="lineno"> 1230</span>&#160;<span class="comment">      &gt; 0: bias towards frustum&#39;s near clipping plane</span></div>
<div class="line"><a name="l01231"></a><span class="lineno"> 1231</span>&#160;<span class="comment">      &lt; 0: bias towards frustum&#39;s far clipping plane</span></div>
<div class="line"><a name="l01232"></a><span class="lineno"> 1232</span>&#160;<span class="comment">      When you have curves and points that are &quot;on&quot; shaded objects,</span></div>
<div class="line"><a name="l01233"></a><span class="lineno"> 1233</span>&#160;<span class="comment">      values around 1/512 work well to move the wire objects</span></div>
<div class="line"><a name="l01234"></a><span class="lineno"> 1234</span>&#160;<span class="comment">      in front of or behind shaded objects.</span></div>
<div class="line"><a name="l01235"></a><span class="lineno"> 1235</span>&#160;<span class="comment"></span> </div>
<div class="line"><a name="l01236"></a><span class="lineno"> 1236</span>&#160;<span class="comment">    clip_bias - [out]</span></div>
<div class="line"><a name="l01237"></a><span class="lineno"> 1237</span>&#160;<span class="comment">      clip_bias = cam2clip * delta * clip2cam,</span></div>
<div class="line"><a name="l01238"></a><span class="lineno"> 1238</span>&#160;<span class="comment">      where delta = 1 0 0 0 </span></div>
<div class="line"><a name="l01239"></a><span class="lineno"> 1239</span>&#160;<span class="comment">                    0 1 0 0</span></div>
<div class="line"><a name="l01240"></a><span class="lineno"> 1240</span>&#160;<span class="comment">                    0 0 1 D</span></div>
<div class="line"><a name="l01241"></a><span class="lineno"> 1241</span>&#160;<span class="comment">                    0 0 0 1</span></div>
<div class="line"><a name="l01242"></a><span class="lineno"> 1242</span>&#160;<span class="comment">      and D = relative_depth_bias*(far-near).</span></div>
<div class="line"><a name="l01243"></a><span class="lineno"> 1243</span>&#160;<span class="comment"></span> </div>
<div class="line"><a name="l01244"></a><span class="lineno"> 1244</span>&#160;<span class="comment">  Returns:</span></div>
<div class="line"><a name="l01245"></a><span class="lineno"> 1245</span>&#160;<span class="comment">    True if the function worked.  False if the frustum settings</span></div>
<div class="line"><a name="l01246"></a><span class="lineno"> 1246</span>&#160;<span class="comment">    are not valild, in which cate the identity matrix is returned.</span></div>
<div class="line"><a name="l01247"></a><span class="lineno"> 1247</span>&#160;<span class="comment"></span> </div>
<div class="line"><a name="l01248"></a><span class="lineno"> 1248</span>&#160;<span class="comment">  Remarks:</span></div>
<div class="line"><a name="l01249"></a><span class="lineno"> 1249</span>&#160;<span class="comment">    The inverse of the transformations returned by </span></div>
<div class="line"><a name="l01250"></a><span class="lineno"> 1250</span>&#160;<span class="comment">    GetClipCoordDepthBiasXform(+r,...) is the transformation</span></div>
<div class="line"><a name="l01251"></a><span class="lineno"> 1251</span>&#160;<span class="comment">    returned by GetClipCoordDepthBiasXform(-r,...).</span></div>
<div class="line"><a name="l01252"></a><span class="lineno"> 1252</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l01253"></a><span class="lineno"> 1253</span>&#160;  <span class="keywordtype">bool</span> GetClipCoordDepthBiasXform( </div>
<div class="line"><a name="l01254"></a><span class="lineno"> 1254</span>&#160;    <span class="keywordtype">double</span> relative_depth_bias,</div>
<div class="line"><a name="l01255"></a><span class="lineno"> 1255</span>&#160;    <a class="code" href="class_o_n___xform.html">ON_Xform</a>&amp; clip_bias</div>
<div class="line"><a name="l01256"></a><span class="lineno"> 1256</span>&#160;    ) <span class="keyword">const</span>;</div>
<div class="line"><a name="l01257"></a><span class="lineno"> 1257</span>&#160; </div>
<div class="line"><a name="l01258"></a><span class="lineno"> 1258</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l01259"></a><span class="lineno"> 1259</span>&#160;<span class="comment">  Description:</span></div>
<div class="line"><a name="l01260"></a><span class="lineno"> 1260</span>&#160;<span class="comment">    Set suggested the perspective minimum near distance and</span></div>
<div class="line"><a name="l01261"></a><span class="lineno"> 1261</span>&#160;<span class="comment">    minimum near/far ratio to the suggested values returned</span></div>
<div class="line"><a name="l01262"></a><span class="lineno"> 1262</span>&#160;<span class="comment">    by GetPerspectiveClippingPlaneConstraints().</span></div>
<div class="line"><a name="l01263"></a><span class="lineno"> 1263</span>&#160;<span class="comment">  Parameters:</span></div>
<div class="line"><a name="l01264"></a><span class="lineno"> 1264</span>&#160;<span class="comment">    depth_buffer_bit_depth - [in]</span></div>
<div class="line"><a name="l01265"></a><span class="lineno"> 1265</span>&#160;<span class="comment">      typically 32, 24, 16 or 8, but any positive value can be </span></div>
<div class="line"><a name="l01266"></a><span class="lineno"> 1266</span>&#160;<span class="comment">      passed in.</span></div>
<div class="line"><a name="l01267"></a><span class="lineno"> 1267</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l01268"></a><span class="lineno"> 1268</span>&#160;  <span class="keywordtype">void</span> SetPerspectiveClippingPlaneConstraints(</div>
<div class="line"><a name="l01269"></a><span class="lineno"> 1269</span>&#160;        <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> depth_buffer_bit_depth</div>
<div class="line"><a name="l01270"></a><span class="lineno"> 1270</span>&#160;        );</div>
<div class="line"><a name="l01271"></a><span class="lineno"> 1271</span>&#160; </div>
<div class="line"><a name="l01272"></a><span class="lineno"> 1272</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l01273"></a><span class="lineno"> 1273</span>&#160;<span class="comment">  Description:</span></div>
<div class="line"><a name="l01274"></a><span class="lineno"> 1274</span>&#160;<span class="comment">    Expert user function to control the minimum</span></div>
<div class="line"><a name="l01275"></a><span class="lineno"> 1275</span>&#160;<span class="comment">    ratio of near/far when perspective projections</span></div>
<div class="line"><a name="l01276"></a><span class="lineno"> 1276</span>&#160;<span class="comment">    are begin used.</span></div>
<div class="line"><a name="l01277"></a><span class="lineno"> 1277</span>&#160;<span class="comment">  Parameters:</span></div>
<div class="line"><a name="l01278"></a><span class="lineno"> 1278</span>&#160;<span class="comment">    min_near_over_far - [in]</span></div>
<div class="line"><a name="l01279"></a><span class="lineno"> 1279</span>&#160;<span class="comment">  Remarks:</span></div>
<div class="line"><a name="l01280"></a><span class="lineno"> 1280</span>&#160;<span class="comment">    This is a runtime setting and is not saved in 3dm files.</span></div>
<div class="line"><a name="l01281"></a><span class="lineno"> 1281</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l01282"></a><span class="lineno"> 1282</span>&#160;  <span class="keywordtype">void</span> SetPerspectiveMinNearOverFar(<span class="keywordtype">double</span> min_near_over_far);</div>
<div class="line"><a name="l01283"></a><span class="lineno"> 1283</span>&#160; </div>
<div class="line"><a name="l01284"></a><span class="lineno"> 1284</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l01285"></a><span class="lineno"> 1285</span>&#160;<span class="comment">  Description:</span></div>
<div class="line"><a name="l01286"></a><span class="lineno"> 1286</span>&#160;<span class="comment">    Expert user function to get the minimum runtime</span></div>
<div class="line"><a name="l01287"></a><span class="lineno"> 1287</span>&#160;<span class="comment">    value of near/far when perspective projections</span></div>
<div class="line"><a name="l01288"></a><span class="lineno"> 1288</span>&#160;<span class="comment">    are begin used.</span></div>
<div class="line"><a name="l01289"></a><span class="lineno"> 1289</span>&#160;<span class="comment">  Returns:</span></div>
<div class="line"><a name="l01290"></a><span class="lineno"> 1290</span>&#160;<span class="comment">    The minimum permitted value of near/far when perspective </span></div>
<div class="line"><a name="l01291"></a><span class="lineno"> 1291</span>&#160;<span class="comment">    projections are begin used.</span></div>
<div class="line"><a name="l01292"></a><span class="lineno"> 1292</span>&#160;<span class="comment">  Remarks:</span></div>
<div class="line"><a name="l01293"></a><span class="lineno"> 1293</span>&#160;<span class="comment">    This is a runtime setting and is not saved in 3dm files.</span></div>
<div class="line"><a name="l01294"></a><span class="lineno"> 1294</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l01295"></a><span class="lineno"> 1295</span>&#160;  <span class="keywordtype">double</span> PerspectiveMinNearOverFar() <span class="keyword">const</span>;</div>
<div class="line"><a name="l01296"></a><span class="lineno"> 1296</span>&#160; </div>
<div class="line"><a name="l01297"></a><span class="lineno"> 1297</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l01298"></a><span class="lineno"> 1298</span>&#160;<span class="comment">  Description:</span></div>
<div class="line"><a name="l01299"></a><span class="lineno"> 1299</span>&#160;<span class="comment">    Expert user function to control the minimum</span></div>
<div class="line"><a name="l01300"></a><span class="lineno"> 1300</span>&#160;<span class="comment">    value of near when perspective projections</span></div>
<div class="line"><a name="l01301"></a><span class="lineno"> 1301</span>&#160;<span class="comment">    are begin used.</span></div>
<div class="line"><a name="l01302"></a><span class="lineno"> 1302</span>&#160;<span class="comment">  Parameters:</span></div>
<div class="line"><a name="l01303"></a><span class="lineno"> 1303</span>&#160;<span class="comment">    min_near_dist - [in]</span></div>
<div class="line"><a name="l01304"></a><span class="lineno"> 1304</span>&#160;<span class="comment">  Remarks:</span></div>
<div class="line"><a name="l01305"></a><span class="lineno"> 1305</span>&#160;<span class="comment">    This is a runtime setting and is not saved in 3dm files.</span></div>
<div class="line"><a name="l01306"></a><span class="lineno"> 1306</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l01307"></a><span class="lineno"> 1307</span>&#160;  <span class="keywordtype">void</span> SetPerspectiveMinNearDist(<span class="keywordtype">double</span> min_near_dist);</div>
<div class="line"><a name="l01308"></a><span class="lineno"> 1308</span>&#160; </div>
<div class="line"><a name="l01309"></a><span class="lineno"> 1309</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l01310"></a><span class="lineno"> 1310</span>&#160;<span class="comment">  Description:</span></div>
<div class="line"><a name="l01311"></a><span class="lineno"> 1311</span>&#160;<span class="comment">    Expert user function to get the minimum</span></div>
<div class="line"><a name="l01312"></a><span class="lineno"> 1312</span>&#160;<span class="comment">    value of near when perspective projections</span></div>
<div class="line"><a name="l01313"></a><span class="lineno"> 1313</span>&#160;<span class="comment">    are begin used.</span></div>
<div class="line"><a name="l01314"></a><span class="lineno"> 1314</span>&#160;<span class="comment">  Returns:</span></div>
<div class="line"><a name="l01315"></a><span class="lineno"> 1315</span>&#160;<span class="comment">    The minimum permitted value of near when perspective </span></div>
<div class="line"><a name="l01316"></a><span class="lineno"> 1316</span>&#160;<span class="comment">    projections are begin used.</span></div>
<div class="line"><a name="l01317"></a><span class="lineno"> 1317</span>&#160;<span class="comment">  Remarks:</span></div>
<div class="line"><a name="l01318"></a><span class="lineno"> 1318</span>&#160;<span class="comment">    This is a runtime setting and is not saved in 3dm files.</span></div>
<div class="line"><a name="l01319"></a><span class="lineno"> 1319</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l01320"></a><span class="lineno"> 1320</span>&#160;  <span class="keywordtype">double</span> PerspectiveMinNearDist() <span class="keyword">const</span>;</div>
<div class="line"><a name="l01321"></a><span class="lineno"> 1321</span>&#160;  </div>
<div class="line"><a name="l01322"></a><span class="lineno"> 1322</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l01323"></a><span class="lineno"> 1323</span>&#160;<span class="comment">  Description:</span></div>
<div class="line"><a name="l01324"></a><span class="lineno"> 1324</span>&#160;<span class="comment">    Sets the viewport&#39;s id to the value used to </span></div>
<div class="line"><a name="l01325"></a><span class="lineno"> 1325</span>&#160;<span class="comment">    uniquely identify this viewport.</span></div>
<div class="line"><a name="l01326"></a><span class="lineno"> 1326</span>&#160;<span class="comment">  Parameters:</span></div>
<div class="line"><a name="l01327"></a><span class="lineno"> 1327</span>&#160;<span class="comment">    viewport_id - [in]    </span></div>
<div class="line"><a name="l01328"></a><span class="lineno"> 1328</span>&#160;<span class="comment">  Returns:</span></div>
<div class="line"><a name="l01329"></a><span class="lineno"> 1329</span>&#160;<span class="comment">    True if the viewport&#39;s id was successfully set</span></div>
<div class="line"><a name="l01330"></a><span class="lineno"> 1330</span>&#160;<span class="comment">    and false otherwise (ie. the viewport uuid has</span></div>
<div class="line"><a name="l01331"></a><span class="lineno"> 1331</span>&#160;<span class="comment">    already been set).</span></div>
<div class="line"><a name="l01332"></a><span class="lineno"> 1332</span>&#160;<span class="comment">  Remarks:</span></div>
<div class="line"><a name="l01333"></a><span class="lineno"> 1333</span>&#160;<span class="comment">    There is no approved way to change the viewport </span></div>
<div class="line"><a name="l01334"></a><span class="lineno"> 1334</span>&#160;<span class="comment">    id once it is set in order to maintain consistency</span></div>
<div class="line"><a name="l01335"></a><span class="lineno"> 1335</span>&#160;<span class="comment">    across multiple viewports and those routines that </span></div>
<div class="line"><a name="l01336"></a><span class="lineno"> 1336</span>&#160;<span class="comment">    manage them.</span></div>
<div class="line"><a name="l01337"></a><span class="lineno"> 1337</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l01338"></a><span class="lineno"> 1338</span>&#160;  <span class="keywordtype">bool</span>  SetViewportId(<span class="keyword">const</span> <a class="code" href="class_o_n___u_u_i_d.html">ON_UUID</a>&amp; viewport_id );</div>
<div class="line"><a name="l01339"></a><span class="lineno"> 1339</span>&#160; </div>
<div class="line"><a name="l01340"></a><span class="lineno"> 1340</span>&#160;  <a class="code" href="class_o_n___u_u_i_d.html">ON_UUID</a> ViewportId(<span class="keywordtype">void</span>) <span class="keyword">const</span>;</div>
<div class="line"><a name="l01341"></a><span class="lineno"> 1341</span>&#160; </div>
<div class="line"><a name="l01342"></a><span class="lineno"> 1342</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l01343"></a><span class="lineno"> 1343</span>&#160;<span class="comment">  Description:</span></div>
<div class="line"><a name="l01344"></a><span class="lineno"> 1344</span>&#160;<span class="comment">    EXPERT USER function to change the viewport&#39;s id.</span></div>
<div class="line"><a name="l01345"></a><span class="lineno"> 1345</span>&#160;<span class="comment">    If you change the id, you risk damaging display</span></div>
<div class="line"><a name="l01346"></a><span class="lineno"> 1346</span>&#160;<span class="comment">    and visibility relationships in the model.</span></div>
<div class="line"><a name="l01347"></a><span class="lineno"> 1347</span>&#160;<span class="comment">  Parameters:</span></div>
<div class="line"><a name="l01348"></a><span class="lineno"> 1348</span>&#160;<span class="comment">    viewport_id - [in]    </span></div>
<div class="line"><a name="l01349"></a><span class="lineno"> 1349</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l01350"></a><span class="lineno"> 1350</span>&#160;  <span class="keywordtype">void</span> ChangeViewportId(<span class="keyword">const</span> <a class="code" href="class_o_n___u_u_i_d.html">ON_UUID</a>&amp; viewport_id);</div>
<div class="line"><a name="l01351"></a><span class="lineno"> 1351</span>&#160;  </div>
<div class="line"><a name="l01352"></a><span class="lineno"> 1352</span>&#160;<span class="keyword">protected</span>:</div>
<div class="line"><a name="l01353"></a><span class="lineno"> 1353</span>&#160; </div>
<div class="line"><a name="l01354"></a><span class="lineno"> 1354</span>&#160;  <span class="comment">// These boolean status flags are set to true when</span></div>
<div class="line"><a name="l01355"></a><span class="lineno"> 1355</span>&#160;  <span class="comment">// the associated fields contain valid values.</span></div>
<div class="line"><a name="l01356"></a><span class="lineno"> 1356</span>&#160;  <span class="keywordtype">bool</span> m_bValidCamera;</div>
<div class="line"><a name="l01357"></a><span class="lineno"> 1357</span>&#160;  <span class="keywordtype">bool</span> m_bValidFrustum;</div>
<div class="line"><a name="l01358"></a><span class="lineno"> 1358</span>&#160;  <span class="keywordtype">bool</span> m_bValidPort;</div>
<div class="line"><a name="l01359"></a><span class="lineno"> 1359</span>&#160;  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> m_reserved1;</div>
<div class="line"><a name="l01360"></a><span class="lineno"> 1360</span>&#160; </div>
<div class="line"><a name="l01361"></a><span class="lineno"> 1361</span>&#160;  <span class="comment">// Camera Settings: ///////////////////////////////////////////////</span></div>
<div class="line"><a name="l01362"></a><span class="lineno"> 1362</span>&#160; </div>
<div class="line"><a name="l01363"></a><span class="lineno"> 1363</span>&#160;  <span class="comment">// perspective or parallel projection</span></div>
<div class="line"><a name="l01364"></a><span class="lineno"> 1364</span>&#160;  ON::view_projection m_projection;</div>
<div class="line"><a name="l01365"></a><span class="lineno"> 1365</span>&#160; </div>
<div class="line"><a name="l01366"></a><span class="lineno"> 1366</span>&#160;  <span class="comment">//   Camera location, direction and orientation (in world coordinates).</span></div>
<div class="line"><a name="l01367"></a><span class="lineno"> 1367</span>&#160;  <span class="comment">//   These values are used to set the camera frame vectors CamX, CamY,</span></div>
<div class="line"><a name="l01368"></a><span class="lineno"> 1368</span>&#160;  <span class="comment">//   CamZ.  If bValidCamera is true, then the CamX, CamY and CamZ</span></div>
<div class="line"><a name="l01369"></a><span class="lineno"> 1369</span>&#160;  <span class="comment">//   vectors are properly initialized and should be used</span></div>
<div class="line"><a name="l01370"></a><span class="lineno"> 1370</span>&#160;  <span class="comment">//   instead of CamDir[] and CamUp[].  The frame vectors CamX, CamY, CamZ</span></div>
<div class="line"><a name="l01371"></a><span class="lineno"> 1371</span>&#160;  <span class="comment">//   are always a right handed orthonormal frame.  The CamDir</span></div>
<div class="line"><a name="l01372"></a><span class="lineno"> 1372</span>&#160;  <span class="comment">//   and CamUp vectors contain the values passed to SetViewCamera().</span></div>
<div class="line"><a name="l01373"></a><span class="lineno"> 1373</span>&#160; </div>
<div class="line"><a name="l01374"></a><span class="lineno"> 1374</span>&#160;  <span class="comment">// If true and the camera is valid, then the corresponding camera</span></div>
<div class="line"><a name="l01375"></a><span class="lineno"> 1375</span>&#160;  <span class="comment">// parameter will not be changed by view editing functions. This</span></div>
<div class="line"><a name="l01376"></a><span class="lineno"> 1376</span>&#160;  <span class="comment">// permits user interface to easily preserve important camera</span></div>
<div class="line"><a name="l01377"></a><span class="lineno"> 1377</span>&#160;  <span class="comment">// features without having to perform excessive calculations.</span></div>
<div class="line"><a name="l01378"></a><span class="lineno"> 1378</span>&#160;  <span class="keywordtype">bool</span> m_bLockCamUp;</div>
<div class="line"><a name="l01379"></a><span class="lineno"> 1379</span>&#160;  <span class="keywordtype">bool</span> m_bLockCamDir;</div>
<div class="line"><a name="l01380"></a><span class="lineno"> 1380</span>&#160;  <span class="keywordtype">bool</span> m_bLockCamLoc;</div>
<div class="line"><a name="l01381"></a><span class="lineno"> 1381</span>&#160;  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> m_frustum_symmetry_flags; <span class="comment">// 0 != (flags &amp; 1) top/bottom symmetry enforced</span></div>
<div class="line"><a name="l01382"></a><span class="lineno"> 1382</span>&#160;                                          <span class="comment">// 0 != (flags &amp; 2) left/right symmetry enforced.</span></div>
<div class="line"><a name="l01383"></a><span class="lineno"> 1383</span>&#160;  <a class="code" href="class_o_n__3d_point.html">ON_3dPoint</a> m_CamLoc;  <span class="comment">// camera location</span></div>
<div class="line"><a name="l01384"></a><span class="lineno"> 1384</span>&#160;  <a class="code" href="class_o_n__3d_vector.html">ON_3dVector</a> m_CamDir; <span class="comment">// from camera towards view (nonzero and not parallel to m_CamUp)</span></div>
<div class="line"><a name="l01385"></a><span class="lineno"> 1385</span>&#160;  <a class="code" href="class_o_n__3d_vector.html">ON_3dVector</a> m_CamUp;  <span class="comment">// (nonzero and not parallel to m_CamDir)</span></div>
<div class="line"><a name="l01386"></a><span class="lineno"> 1386</span>&#160; </div>
<div class="line"><a name="l01387"></a><span class="lineno"> 1387</span>&#160;  <span class="comment">// The camera frame vectors are properly initialized by SetCamera()</span></div>
<div class="line"><a name="l01388"></a><span class="lineno"> 1388</span>&#160;  <a class="code" href="class_o_n__3d_vector.html">ON_3dVector</a> m_CamX;</div>
<div class="line"><a name="l01389"></a><span class="lineno"> 1389</span>&#160;  <a class="code" href="class_o_n__3d_vector.html">ON_3dVector</a> m_CamY;</div>
<div class="line"><a name="l01390"></a><span class="lineno"> 1390</span>&#160;  <a class="code" href="class_o_n__3d_vector.html">ON_3dVector</a> m_CamZ;</div>
<div class="line"><a name="l01391"></a><span class="lineno"> 1391</span>&#160; </div>
<div class="line"><a name="l01392"></a><span class="lineno"> 1392</span>&#160;  <span class="comment">// View Frustum Settings: ///////////////////////////////////////</span></div>
<div class="line"><a name="l01393"></a><span class="lineno"> 1393</span>&#160;  <span class="comment">//   left, right are camera X coords on near clipping plane</span></div>
<div class="line"><a name="l01394"></a><span class="lineno"> 1394</span>&#160;  <span class="comment">//   bottom, top are camera Y coords on near clipping plane</span></div>
<div class="line"><a name="l01395"></a><span class="lineno"> 1395</span>&#160;  <span class="comment">//   near = distance from camera to near clipping plane</span></div>
<div class="line"><a name="l01396"></a><span class="lineno"> 1396</span>&#160;  <span class="comment">//   far = distance from camera to far clipping plane</span></div>
<div class="line"><a name="l01397"></a><span class="lineno"> 1397</span>&#160;  <span class="keywordtype">double</span> m_frus_left,   m_frus_right; <span class="comment">// frus_left &lt; frus_right </span></div>
<div class="line"><a name="l01398"></a><span class="lineno"> 1398</span>&#160;  <span class="keywordtype">double</span> m_frus_bottom, m_frus_top;   <span class="comment">// frus_bottom &lt; frus_top </span></div>
<div class="line"><a name="l01399"></a><span class="lineno"> 1399</span>&#160;  <span class="keywordtype">double</span> m_frus_near,   m_frus_far;   <span class="comment">// frus_near &lt; frus_far </span></div>
<div class="line"><a name="l01400"></a><span class="lineno"> 1400</span>&#160;                                      <span class="comment">// in perspective, 0 &lt; frus_near</span></div>
<div class="line"><a name="l01401"></a><span class="lineno"> 1401</span>&#160;  </div>
<div class="line"><a name="l01402"></a><span class="lineno"> 1402</span>&#160; </div>
<div class="line"><a name="l01403"></a><span class="lineno"> 1403</span>&#160;  <span class="comment">// Device View Port Box Settings: ( in display device coordinates ) ////</span></div>
<div class="line"><a name="l01404"></a><span class="lineno"> 1404</span>&#160;  <span class="comment">//   The point (left,bottom,-near), in camera coordinates, of the view</span></div>
<div class="line"><a name="l01405"></a><span class="lineno"> 1405</span>&#160;  <span class="comment">//   frustum is mapped to pixel coordinate (port_left,port_bottom,port_near).</span></div>
<div class="line"><a name="l01406"></a><span class="lineno"> 1406</span>&#160;  <span class="comment">//   The point (right,top,-far), in camera coordinates, of the view frustum </span></div>
<div class="line"><a name="l01407"></a><span class="lineno"> 1407</span>&#160;  <span class="comment">//   is mapped to pixel coordinate (port_right,port_top,port_far).</span></div>
<div class="line"><a name="l01408"></a><span class="lineno"> 1408</span>&#160;  <span class="keywordtype">int</span> m_port_left,   m_port_right; <span class="comment">// port_left != port_right</span></div>
<div class="line"><a name="l01409"></a><span class="lineno"> 1409</span>&#160;  <span class="keywordtype">int</span> m_port_bottom, m_port_top;   <span class="comment">// port_bottom != port_top  </span></div>
<div class="line"><a name="l01410"></a><span class="lineno"> 1410</span>&#160;                                   <span class="comment">// In many situations including Windows,</span></div>
<div class="line"><a name="l01411"></a><span class="lineno"> 1411</span>&#160;                                   <span class="comment">// port_left = 0,</span></div>
<div class="line"><a name="l01412"></a><span class="lineno"> 1412</span>&#160;                                   <span class="comment">// port_right = viewport width-1,</span></div>
<div class="line"><a name="l01413"></a><span class="lineno"> 1413</span>&#160;                                   <span class="comment">// port_top = 0,</span></div>
<div class="line"><a name="l01414"></a><span class="lineno"> 1414</span>&#160;                                   <span class="comment">// port_bottom = viewport height-1.</span></div>
<div class="line"><a name="l01415"></a><span class="lineno"> 1415</span>&#160;  <span class="keywordtype">int</span> m_port_near,   m_port_far;   <span class="comment">// (If you want an 8 bit z-buffer with </span></div>
<div class="line"><a name="l01416"></a><span class="lineno"> 1416</span>&#160;                                   <span class="comment">// z=255 being &quot;in front of&quot; z=0, then</span></div>
<div class="line"><a name="l01417"></a><span class="lineno"> 1417</span>&#160;                                   <span class="comment">// set port_near = 255 and port_far = 0.)</span></div>
<div class="line"><a name="l01418"></a><span class="lineno"> 1418</span>&#160; </div>
<div class="line"><a name="l01419"></a><span class="lineno"> 1419</span>&#160; </div>
<div class="line"><a name="l01420"></a><span class="lineno"> 1420</span>&#160;  <span class="comment">// The location of this point has no impact on the </span></div>
<div class="line"><a name="l01421"></a><span class="lineno"> 1421</span>&#160;  <span class="comment">// view projection. It is simply a suggestion for a </span></div>
<div class="line"><a name="l01422"></a><span class="lineno"> 1422</span>&#160;  <span class="comment">// fixed point when views are rotated or the isometric </span></div>
<div class="line"><a name="l01423"></a><span class="lineno"> 1423</span>&#160;  <span class="comment">// depth when perpsective views are dollied.  The default</span></div>
<div class="line"><a name="l01424"></a><span class="lineno"> 1424</span>&#160;  <span class="comment">// is ON_UNSET_POINT.</span></div>
<div class="line"><a name="l01425"></a><span class="lineno"> 1425</span>&#160;  <a class="code" href="class_o_n__3d_point.html">ON_3dPoint</a> m_target_point;</div>
<div class="line"><a name="l01426"></a><span class="lineno"> 1426</span>&#160; </div>
<div class="line"><a name="l01427"></a><span class="lineno"> 1427</span>&#160;<span class="keyword">private</span>:</div>
<div class="line"><a name="l01428"></a><span class="lineno"> 1428</span>&#160;  <span class="comment">// When this id matches the viewport id saved in an ON_DisplayMaterialRef</span></div>
<div class="line"><a name="l01429"></a><span class="lineno"> 1429</span>&#160;  <span class="comment">// list in ON_3dmObjectAttributes, then the the display material is used</span></div>
<div class="line"><a name="l01430"></a><span class="lineno"> 1430</span>&#160;  <span class="comment">// for that object in this view.</span></div>
<div class="line"><a name="l01431"></a><span class="lineno"> 1431</span>&#160;  <a class="code" href="class_o_n___u_u_i_d.html">ON_UUID</a> m_viewport_id;</div>
<div class="line"><a name="l01432"></a><span class="lineno"> 1432</span>&#160; </div>
<div class="line"><a name="l01433"></a><span class="lineno"> 1433</span>&#160;  <span class="keywordtype">bool</span> SetCameraFrame(); <span class="comment">// used to set m_CamX, m_CamY, m_CamZ</span></div>
<div class="line"><a name="l01434"></a><span class="lineno"> 1434</span>&#160; </div>
<div class="line"><a name="l01435"></a><span class="lineno"> 1435</span>&#160;  <span class="comment">// This transform is used to tweak the clipping </span></div>
<div class="line"><a name="l01436"></a><span class="lineno"> 1436</span>&#160;  <span class="comment">// coordinates.  The default is the identity.  </span></div>
<div class="line"><a name="l01437"></a><span class="lineno"> 1437</span>&#160;  <span class="comment">// Modify this transformation when you need to do</span></div>
<div class="line"><a name="l01438"></a><span class="lineno"> 1438</span>&#160;  <span class="comment">// things like z-buffer bias, non-uniform viewplane</span></div>
<div class="line"><a name="l01439"></a><span class="lineno"> 1439</span>&#160;  <span class="comment">// scaling, and so on.</span></div>
<div class="line"><a name="l01440"></a><span class="lineno"> 1440</span>&#160; </div>
<div class="line"><a name="l01441"></a><span class="lineno"> 1441</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l01442"></a><span class="lineno"> 1442</span>&#160;<span class="comment">  Description:</span></div>
<div class="line"><a name="l01443"></a><span class="lineno"> 1443</span>&#160;<span class="comment">    Sets the m_clip_mod transformation;</span></div>
<div class="line"><a name="l01444"></a><span class="lineno"> 1444</span>&#160;<span class="comment">  Parameters:</span></div>
<div class="line"><a name="l01445"></a><span class="lineno"> 1445</span>&#160;<span class="comment">    clip_mod_xform - [in] invertable transformation</span></div>
<div class="line"><a name="l01446"></a><span class="lineno"> 1446</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l01447"></a><span class="lineno"> 1447</span>&#160;  <span class="keywordtype">bool</span> SetClipModXform( <a class="code" href="class_o_n___xform.html">ON_Xform</a> clip_mod_xform );</div>
<div class="line"><a name="l01448"></a><span class="lineno"> 1448</span>&#160;  <a class="code" href="class_o_n___xform.html">ON_Xform</a> m_clip_mods;</div>
<div class="line"><a name="l01449"></a><span class="lineno"> 1449</span>&#160;  <a class="code" href="class_o_n___xform.html">ON_Xform</a> m_clip_mods_inverse;</div>
<div class="line"><a name="l01450"></a><span class="lineno"> 1450</span>&#160; </div>
<div class="line"><a name="l01451"></a><span class="lineno"> 1451</span>&#160;  <span class="comment">// Runtime values that depend on the graphics hardware being used.</span></div>
<div class="line"><a name="l01452"></a><span class="lineno"> 1452</span>&#160;  <span class="comment">// These values are not saved in 3dm files.</span></div>
<div class="line"><a name="l01453"></a><span class="lineno"> 1453</span>&#160;  <span class="keywordtype">double</span> m__MIN_NEAR_DIST;</div>
<div class="line"><a name="l01454"></a><span class="lineno"> 1454</span>&#160;  <span class="keywordtype">double</span> m__MIN_NEAR_OVER_FAR;</div>
<div class="line"><a name="l01455"></a><span class="lineno"> 1455</span>&#160; </div>
<div class="line"><a name="l01456"></a><span class="lineno"> 1456</span>&#160;<span class="keyword">public</span>:</div>
<div class="line"><a name="l01457"></a><span class="lineno"> 1457</span>&#160;  <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">double</span> DefaultNearDist;        <span class="comment">// 0.005</span></div>
<div class="line"><a name="l01458"></a><span class="lineno"> 1458</span>&#160;  <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">double</span> DefaultFarDist;         <span class="comment">// 1000.0</span></div>
<div class="line"><a name="l01459"></a><span class="lineno"> 1459</span>&#160;  <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">double</span> DefaultMinNearDist;     <span class="comment">// 0.0001</span></div>
<div class="line"><a name="l01460"></a><span class="lineno"> 1460</span>&#160;  <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">double</span> DefaultMinNearOverFar;  <span class="comment">// 0.0001</span></div>
<div class="line"><a name="l01461"></a><span class="lineno"> 1461</span>&#160;};</div>
<div class="line"><a name="l01462"></a><span class="lineno"> 1462</span>&#160; </div>
<div class="line"><a name="l01463"></a><span class="lineno"> 1463</span>&#160;ON_DECL</div>
<div class="line"><a name="l01464"></a><span class="lineno"> 1464</span>&#160;<span class="keywordtype">bool</span> </div>
<div class="line"><a name="l01465"></a><span class="lineno"> 1465</span>&#160;ON_GetViewportRotationAngles( </div>
<div class="line"><a name="l01466"></a><span class="lineno"> 1466</span>&#160;    <span class="keyword">const</span> <a class="code" href="class_o_n__3d_vector.html">ON_3dVector</a>&amp;, <span class="comment">// X, // X,Y,Z must be a right handed orthonormal basis</span></div>
<div class="line"><a name="l01467"></a><span class="lineno"> 1467</span>&#160;    <span class="keyword">const</span> <a class="code" href="class_o_n__3d_vector.html">ON_3dVector</a>&amp;, <span class="comment">// Y, </span></div>
<div class="line"><a name="l01468"></a><span class="lineno"> 1468</span>&#160;    <span class="keyword">const</span> <a class="code" href="class_o_n__3d_vector.html">ON_3dVector</a>&amp;, <span class="comment">// Z,</span></div>
<div class="line"><a name="l01469"></a><span class="lineno"> 1469</span>&#160;    <span class="keywordtype">double</span>*, <span class="comment">// angle1, // returns rotation about world Z</span></div>
<div class="line"><a name="l01470"></a><span class="lineno"> 1470</span>&#160;    <span class="keywordtype">double</span>*, <span class="comment">// angle2, // returns rotation about world X ( 0 &lt;= a2 &lt;= pi )</span></div>
<div class="line"><a name="l01471"></a><span class="lineno"> 1471</span>&#160;    <span class="keywordtype">double</span>*  <span class="comment">// angle3  // returns rotation about world Z</span></div>
<div class="line"><a name="l01472"></a><span class="lineno"> 1472</span>&#160;    );</div>
<div class="line"><a name="l01473"></a><span class="lineno"> 1473</span>&#160; </div>
<div class="line"><a name="l01474"></a><span class="lineno"> 1474</span>&#160;ON_DECL</div>
<div class="line"><a name="l01475"></a><span class="lineno"> 1475</span>&#160;<span class="keywordtype">bool</span></div>
<div class="line"><a name="l01476"></a><span class="lineno"> 1476</span>&#160;ON_ViewportFromRhinoView( <span class="comment">// create ON_Viewport from legacy Rhino projection info</span></div>
<div class="line"><a name="l01477"></a><span class="lineno"> 1477</span>&#160;        ON::view_projection, <span class="comment">// projection,</span></div>
<div class="line"><a name="l01478"></a><span class="lineno"> 1478</span>&#160;        <span class="keyword">const</span> <a class="code" href="class_o_n__3d_point.html">ON_3dPoint</a>&amp;, <span class="comment">// rhvp_target, // 3d point</span></div>
<div class="line"><a name="l01479"></a><span class="lineno"> 1479</span>&#160;        <span class="keywordtype">double</span>, <span class="comment">// rhvp_angle1 in radians</span></div>
<div class="line"><a name="l01480"></a><span class="lineno"> 1480</span>&#160;        <span class="keywordtype">double</span>, <span class="comment">// rhvp_angle2 in radians</span></div>
<div class="line"><a name="l01481"></a><span class="lineno"> 1481</span>&#160;        <span class="keywordtype">double</span>, <span class="comment">// rhvp_angle3 in radians</span></div>
<div class="line"><a name="l01482"></a><span class="lineno"> 1482</span>&#160;        <span class="keywordtype">double</span>, <span class="comment">// rhvp_viewsize,     // &gt; 0</span></div>
<div class="line"><a name="l01483"></a><span class="lineno"> 1483</span>&#160;        <span class="keywordtype">double</span>, <span class="comment">// rhvp_cameradist,   // &gt; 0</span></div>
<div class="line"><a name="l01484"></a><span class="lineno"> 1484</span>&#160;        <span class="keywordtype">int</span>, <span class="comment">// screen_width, </span></div>
<div class="line"><a name="l01485"></a><span class="lineno"> 1485</span>&#160;        <span class="keywordtype">int</span>, <span class="comment">// screen_height,</span></div>
<div class="line"><a name="l01486"></a><span class="lineno"> 1486</span>&#160;        <a class="code" href="class_o_n___viewport.html">ON_Viewport</a>&amp;</div>
<div class="line"><a name="l01487"></a><span class="lineno"> 1487</span>&#160;        );</div>
<div class="line"><a name="l01488"></a><span class="lineno"> 1488</span>&#160; </div>
<div class="line"><a name="l01489"></a><span class="lineno"> 1489</span>&#160;<span class="comment">/*</span></div>
<div class="line"><a name="l01490"></a><span class="lineno"> 1490</span>&#160;<span class="comment">Description:</span></div>
<div class="line"><a name="l01491"></a><span class="lineno"> 1491</span>&#160;<span class="comment">  Calculate the corners of the polygon that is the</span></div>
<div class="line"><a name="l01492"></a><span class="lineno"> 1492</span>&#160;<span class="comment">  intersection of a view frustum with and infinte plane.</span></div>
<div class="line"><a name="l01493"></a><span class="lineno"> 1493</span>&#160;<span class="comment">Parameters:</span></div>
<div class="line"><a name="l01494"></a><span class="lineno"> 1494</span>&#160;<span class="comment">  vp - [in] defines view frustum</span></div>
<div class="line"><a name="l01495"></a><span class="lineno"> 1495</span>&#160;<span class="comment">  plane_equation - [in] defined infinte plane</span></div>
<div class="line"><a name="l01496"></a><span class="lineno"> 1496</span>&#160;<span class="comment">  points  - [out] corners of the polygon.</span></div>
<div class="line"><a name="l01497"></a><span class="lineno"> 1497</span>&#160;<span class="comment">    If true is returned and points.Count() is zero, then</span></div>
<div class="line"><a name="l01498"></a><span class="lineno"> 1498</span>&#160;<span class="comment">    the plane missed the frustum.  Note that the start/end</span></div>
<div class="line"><a name="l01499"></a><span class="lineno"> 1499</span>&#160;<span class="comment">    point is not duplicated in the list.</span></div>
<div class="line"><a name="l01500"></a><span class="lineno"> 1500</span>&#160;<span class="comment">Returns:</span></div>
<div class="line"><a name="l01501"></a><span class="lineno"> 1501</span>&#160;<span class="comment">  True if input was valid, false otherwise.  Note that</span></div>
<div class="line"><a name="l01502"></a><span class="lineno"> 1502</span>&#160;<span class="comment">  even when true is returned, the returned points.Count()</span></div>
<div class="line"><a name="l01503"></a><span class="lineno"> 1503</span>&#160;<span class="comment">  may be zero if the plane and frustum do not intersect.</span></div>
<div class="line"><a name="l01504"></a><span class="lineno"> 1504</span>&#160;<span class="comment">*/</span></div>
<div class="line"><a name="l01505"></a><span class="lineno"> 1505</span>&#160;ON_DECL</div>
<div class="line"><a name="l01506"></a><span class="lineno"> 1506</span>&#160;<span class="keywordtype">bool</span></div>
<div class="line"><a name="l01507"></a><span class="lineno"> 1507</span>&#160;ON_IntersectViewFrustumPlane(</div>
<div class="line"><a name="l01508"></a><span class="lineno"> 1508</span>&#160;          <span class="keyword">const</span> <a class="code" href="class_o_n___viewport.html">ON_Viewport</a>&amp; vp,</div>
<div class="line"><a name="l01509"></a><span class="lineno"> 1509</span>&#160;          <span class="keyword">const</span> <a class="code" href="class_o_n___plane_equation.html">ON_PlaneEquation</a>&amp; plane_equation, </div>
<div class="line"><a name="l01510"></a><span class="lineno"> 1510</span>&#160;          <a class="code" href="class_o_n___simple_array.html">ON_SimpleArray&lt;ON_3dPoint&gt;</a>&amp; points </div>
<div class="line"><a name="l01511"></a><span class="lineno"> 1511</span>&#160;          );</div>
<div class="line"><a name="l01512"></a><span class="lineno"> 1512</span>&#160; </div>
<div class="line"><a name="l01513"></a><span class="lineno"> 1513</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l01514"></a><span class="lineno"> 1514</span>&#160; </div>
<div class="ttc" id="aclass_o_n__3d_point_html"><div class="ttname"><a href="class_o_n__3d_point.html">ON_3dPoint</a></div><div class="ttdef"><b>Definition:</b> opennurbs_point.h:419</div></div>
<div class="ttc" id="aclass_o_n__3d_vector_html"><div class="ttname"><a href="class_o_n__3d_vector.html">ON_3dVector</a></div><div class="ttdef"><b>Definition:</b> opennurbs_point.h:953</div></div>
<div class="ttc" id="aclass_o_n___binary_archive_html"><div class="ttname"><a href="class_o_n___binary_archive.html">ON_BinaryArchive</a></div><div class="ttdef"><b>Definition:</b> opennurbs_archive.h:732</div></div>
<div class="ttc" id="aclass_o_n___bounding_box_html"><div class="ttname"><a href="class_o_n___bounding_box.html">ON_BoundingBox</a></div><div class="ttdef"><b>Definition:</b> opennurbs_bounding_box.h:26</div></div>
<div class="ttc" id="aclass_o_n___geometry_html"><div class="ttname"><a href="class_o_n___geometry.html">ON_Geometry</a></div><div class="ttdef"><b>Definition:</b> opennurbs_geometry.h:37</div></div>
<div class="ttc" id="aclass_o_n___line_html"><div class="ttname"><a href="class_o_n___line.html">ON_Line</a></div><div class="ttdef"><b>Definition:</b> opennurbs_line.h:21</div></div>
<div class="ttc" id="aclass_o_n___plane_equation_html"><div class="ttname"><a href="class_o_n___plane_equation.html">ON_PlaneEquation</a></div><div class="ttdef"><b>Definition:</b> opennurbs_point.h:1193</div></div>
<div class="ttc" id="aclass_o_n___plane_html"><div class="ttname"><a href="class_o_n___plane.html">ON_Plane</a></div><div class="ttdef"><b>Definition:</b> opennurbs_plane.h:21</div></div>
<div class="ttc" id="aclass_o_n___simple_array_html"><div class="ttname"><a href="class_o_n___simple_array.html">ON_SimpleArray&lt; ON_3dPoint &gt;</a></div></div>
<div class="ttc" id="aclass_o_n___sphere_html"><div class="ttname"><a href="class_o_n___sphere.html">ON_Sphere</a></div><div class="ttdef"><b>Definition:</b> opennurbs_sphere.h:23</div></div>
<div class="ttc" id="aclass_o_n___text_log_html"><div class="ttname"><a href="class_o_n___text_log.html">ON_TextLog</a></div><div class="ttdef"><b>Definition:</b> opennurbs_textlog.h:23</div></div>
<div class="ttc" id="aclass_o_n___u_u_i_d_html"><div class="ttname"><a href="class_o_n___u_u_i_d.html">ON_UUID</a></div><div class="ttdef"><b>Definition:</b> opennurbs_uuid.h:32</div></div>
<div class="ttc" id="aclass_o_n___viewport_html"><div class="ttname"><a href="class_o_n___viewport.html">ON_Viewport</a></div><div class="ttdef"><b>Definition:</b> opennurbs_viewport.h:32</div></div>
<div class="ttc" id="aclass_o_n___xform_html"><div class="ttname"><a href="class_o_n___xform.html">ON_Xform</a></div><div class="ttdef"><b>Definition:</b> opennurbs_xform.h:29</div></div>
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